<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2018-9-5-603-608</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-679</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group></article-categories><title-group><article-title>Flintstone as a nanocomposite material for photonics</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Fedorov</surname><given-names>P. P.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><email xlink:type="simple">ppfedorov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Maslov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Voronov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Chernova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Kudryavtsev</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Ralchenko</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Vlasov</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Chislov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Mayakova</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Yarotskaya</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov Street, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Gaynutdinov</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>59 Leninskii Prospect, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>14 Bezhitskaya Street, Bryansk, 241036</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Zentsova</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>14 Bezhitskaya Street, Bryansk, 241036</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Crystallography and Photonics Federal Research Center, Russian Academy of Sciences</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-3"><institution>Petrovskii State University</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>12</day><month>08</month><year>2025</year></pub-date><volume>9</volume><issue>5</issue><fpage>603</fpage><lpage>608</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Fedorov P.P., Maslov V.A., Voronov V.V., Chernova E.V., Kudryavtsev O.S., Ralchenko V.G., Vlasov I.I., Chislov A.S., Mayakova M.N., Yarotskaya E.G., Gaynutdinov R.V., Popov P.A., Zentsova A.I., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Fedorov P.P., Maslov V.A., Voronov V.V., Chernova E.V., Kudryavtsev O.S., Ralchenko V.G., Vlasov I.I., Chislov A.S., Mayakova M.N., Yarotskaya E.G., Gaynutdinov R.V., Popov P.A., Zentsova A.I.</copyright-holder><copyright-holder xml:lang="en">Fedorov P.P., Maslov V.A., Voronov V.V., Chernova E.V., Kudryavtsev O.S., Ralchenko V.G., Vlasov I.I., Chislov A.S., Mayakova M.N., Yarotskaya E.G., Gaynutdinov R.V., Popov P.A., Zentsova A.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://nanojournal.ifmo.ru/jour/article/view/679">https://nanojournal.ifmo.ru/jour/article/view/679</self-uri><abstract><p>Studying natural flintstone samples’ properties, including optical transparency and thermal conductivity, by various physical methods (X-ray diffraction, atomic force microscopy, optical microscopy, etc.) revealed that said specimens contain chalcedony nanoparticles bund into the complex hierarchial structure. </p></abstract><kwd-group xml:lang="en"><kwd>flintstone</kwd><kwd>quartz</kwd><kwd>chalcedony</kwd><kwd>thermal conductivity</kwd><kwd>nanocomposite</kwd><kwd>nanographite photonics</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was performed as a part of research plan of General Physics Institute. Some measurements were done in the Collective Use Centers of General Physics Institute and Institute of General and Inorganic Chemistry of the Russian Academy of Sciences.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Diffraction Nanophotonics. Ed. V. A. Soifer. Moscow, Fizmatlit, 2011, 680 p. (in Russian).</mixed-citation><mixed-citation xml:lang="en">Diffraction Nanophotonics. Ed. V. A. Soifer. Moscow, Fizmatlit, 2011, 680 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Optical properties of photonic structures: interplay of order and disorder. Ed. M.F. Limonov, R.M. De La Rue. Boca Raton, CRC/Taylor&amp; Francis Group, 2012, XVII, 514 pp.</mixed-citation><mixed-citation xml:lang="en">Optical properties of photonic structures: interplay of order and disorder. Ed. M.F. Limonov, R.M. De La Rue. Boca Raton, CRC/Taylor&amp; Francis Group, 2012, XVII, 514 pp.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Wiersma D. The smallest random laser. Nature, 2000, 406, P. 132–133.</mixed-citation><mixed-citation xml:lang="en">Wiersma D. The smallest random laser. Nature, 2000, 406, P. 132–133.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Garc´ıa P.D., Sapienza R., Lo’pez C. Photonic Glasses: A Step Beyond White Paint. Adv. Mater., 2010, 22, P. 12–19.</mixed-citation><mixed-citation xml:lang="en">Garc´ıa P.D., Sapienza R., Lo’pez C. Photonic Glasses: A Step Beyond White Paint. Adv. Mater., 2010, 22, P. 12–19.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Barthelemy P., Bertolotti J., Wiersma D.S. A Le’vy flight for light. Nature, 2008, 453, P. 495–498.</mixed-citation><mixed-citation xml:lang="en">Barthelemy P., Bertolotti J., Wiersma D.S. A Le’vy flight for light. Nature, 2008, 453, P. 495–498.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Kouznetzov S.V., Yarotskya I.V., Fedorov P.P., Voronov V.V., Lavristchev S.V., Basiev T.T., Osiko V.V. Preparation of nanopowdered M1−xRxF2+x (M = Ca, Sr, Ba; R = Ce, Nd, Er, Yb) solid solutions. Rus. J. Inorg. Chem., 2007, 52, P. 315–320.</mixed-citation><mixed-citation xml:lang="en">Kouznetzov S.V., Yarotskya I.V., Fedorov P.P., Voronov V.V., Lavristchev S.V., Basiev T.T., Osiko V.V. Preparation of nanopowdered M1−xRxF2+x (M = Ca, Sr, Ba; R = Ce, Nd, Er, Yb) solid solutions. Rus. J. Inorg. Chem., 2007, 52, P. 315–320.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Fedorov P.P., Tkatchenko E.A., Kouznetzov S.V., Voronov V.V., Lavristchev S.V. Preparation of MgO nanoparticles. Inorg. Mater., 2007, 43, 5, P. 502-504.</mixed-citation><mixed-citation xml:lang="en">Fedorov P.P., Tkatchenko E.A., Kouznetzov S.V., Voronov V.V., Lavristchev S.V. Preparation of MgO nanoparticles. Inorg. Mater., 2007, 43, 5, P. 502-504.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Kuznetsov S.V., Fedorov P.P., Voronov V.V., Samarina K.S., Ermakov R.P., Osiko V.V. Synthesis of Ba4R3F17 (R stands for rare earth elements) powders and transparent compacts on their base. Rus. J. Inorg. Chem., 2010, 55(4), P. 484–493.</mixed-citation><mixed-citation xml:lang="en">Kuznetsov S.V., Fedorov P.P., Voronov V.V., Samarina K.S., Ermakov R.P., Osiko V.V. Synthesis of Ba4R3F17 (R stands for rare earth elements) powders and transparent compacts on their base. Rus. J. Inorg. Chem., 2010, 55(4), P. 484–493.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Kuznetsov S.V., Fedorov P.P., Voronov V.V., Osiko V.V. Synthesis of MgAl2O4 Nanopowders. Inorg. Mater., 2011, 47, P. 895–898.</mixed-citation><mixed-citation xml:lang="en">Kuznetsov S.V., Fedorov P.P., Voronov V.V., Osiko V.V. Synthesis of MgAl2O4 Nanopowders. Inorg. Mater., 2011, 47, P. 895–898.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Fedorov P.P., Kuznetsov S.V., Mayakova M.N., Voronov V.V., Ermakov R.P., Baranchikov A.E., Osiko V.V. Coprecipitation from aqueous solutions to prepare binary fluorides. Rus. J. Inorg. Chem., 2011, 56(10), P. 1525–1531.</mixed-citation><mixed-citation xml:lang="en">Fedorov P.P., Kuznetsov S.V., Mayakova M.N., Voronov V.V., Ermakov R.P., Baranchikov A.E., Osiko V.V. Coprecipitation from aqueous solutions to prepare binary fluorides. Rus. J. Inorg. Chem., 2011, 56(10), P. 1525–1531.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Mayakova M.N., Kuznetsov S.V., Fedorov P.P., Voronov V.V., Ermakov R.P., Boldyrev K.N., Karban’ O.V., Uvarov O.V., Baranchikov A.E., Osiko V.V. Synthesis and characterization of fluoride xerogels. Inorg. Mater., 2013, 49, 11, P. 1152–1156.</mixed-citation><mixed-citation xml:lang="en">Mayakova M.N., Kuznetsov S.V., Fedorov P.P., Voronov V.V., Ermakov R.P., Boldyrev K.N., Karban’ O.V., Uvarov O.V., Baranchikov A.E., Osiko V.V. Synthesis and characterization of fluoride xerogels. Inorg. Mater., 2013, 49, 11, P. 1152–1156.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Mayakova M.N., Luginina A.A., Kuznetsov S.V., Voronov V.V., Ermakov R.P., Baranchikov A.E., Ivanov V.K., Karban’ O.V., Fedorov P.P. Synthesis of SrF2-YF3 nanopowders by co-precipitation from aqueos solutions. Mendeleev Commun., 2014, 24(6), P. 360–362.</mixed-citation><mixed-citation xml:lang="en">Mayakova M.N., Luginina A.A., Kuznetsov S.V., Voronov V.V., Ermakov R.P., Baranchikov A.E., Ivanov V.K., Karban’ O.V., Fedorov P.P. Synthesis of SrF2-YF3 nanopowders by co-precipitation from aqueos solutions. Mendeleev Commun., 2014, 24(6), P. 360–362.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Niederberger M., Colfen H. Oriented attachment and mesocrystals: Non-classical crystallization mechanisms based on nanoparticle assembly. PhysChemChemPhys, 2006, 8, P. 3271–3287.</mixed-citation><mixed-citation xml:lang="en">Niederberger M., Colfen H. Oriented attachment and mesocrystals: Non-classical crystallization mechanisms based on nanoparticle assembly. PhysChemChemPhys, 2006, 8, P. 3271–3287.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Fedorov P.P., Ivanov V.K. Cooperative formation of crystals by aggregation and intergrowth of nanoparticles. Dokl. Phys., 2011, 56(4), P. 205–207.</mixed-citation><mixed-citation xml:lang="en">Fedorov P.P., Ivanov V.K. Cooperative formation of crystals by aggregation and intergrowth of nanoparticles. Dokl. Phys., 2011, 56(4), P. 205–207.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Ivanov V.K., Fedorov P.P., Baranchikov A.Y., Osiko V.V. Oriented aggregation of particles: 100 years of investigations of non-classical crystal growth. Russ. Chem. Rev., 2014, 83(12), P. 1204–1222.</mixed-citation><mixed-citation xml:lang="en">Ivanov V.K., Fedorov P.P., Baranchikov A.Y., Osiko V.V. Oriented aggregation of particles: 100 years of investigations of non-classical crystal growth. Russ. Chem. Rev., 2014, 83(12), P. 1204–1222.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Smol’yaninov N.A. Practical guide to mineralogy. Moscow, Nedra, 1955, 432 p.</mixed-citation><mixed-citation xml:lang="en">Smol’yaninov N.A. Practical guide to mineralogy. Moscow, Nedra, 1955, 432 p.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Godovikov A.A., Ripinen O.I., Motorin S.G. Agates. Moscow, Nedra, 1987, 368 p (in Russian).</mixed-citation><mixed-citation xml:lang="en">Godovikov A.A., Ripinen O.I., Motorin S.G. Agates. Moscow, Nedra, 1987, 368 p (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Zdorik T.B. Opal. Priroda, 1990, 10, P. 40–43 (in Russian).</mixed-citation><mixed-citation xml:lang="en">Zdorik T.B. Opal. Priroda, 1990, 10, P. 40–43 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Frolov V.T. Lithology. Book 1. Moscow, Lomonosov St.Univ., 1992, 336 p. (in Russian).</mixed-citation><mixed-citation xml:lang="en">Frolov V.T. Lithology. Book 1. Moscow, Lomonosov St.Univ., 1992, 336 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Spiridonov E.M., Ladygin V.M., Yanakieva D.Ya., Frolova Yu.V., Semikolennyh E.S. Agates in metavolcanics. Geological conditions, parameters and time of transformation of volcanites into mandelites with agates. Ed. Panchenko V.Ya. “MOLNET” Special issue of the magazine “Herald of RFBR”, Moscow, 2014, 72 p. (in Russian).</mixed-citation><mixed-citation xml:lang="en">Spiridonov E.M., Ladygin V.M., Yanakieva D.Ya., Frolova Yu.V., Semikolennyh E.S. Agates in metavolcanics. Geological conditions, parameters and time of transformation of volcanites into mandelites with agates. Ed. Panchenko V.Ya. “MOLNET” Special issue of the magazine “Herald of RFBR”, Moscow, 2014, 72 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Popov P.A., Sidorov A.A., Kul’chenkov E.A., Anishchenko A.M., Avetissov I.Ch., Sorokin N.I., Fedorov P.P. Thermal conductivity and expansion of PbF2 single crystals. Ionics, 2017, 23, 1, P. 233–239.</mixed-citation><mixed-citation xml:lang="en">Popov P.A., Sidorov A.A., Kul’chenkov E.A., Anishchenko A.M., Avetissov I.Ch., Sorokin N.I., Fedorov P.P. Thermal conductivity and expansion of PbF2 single crystals. Ionics, 2017, 23, 1, P. 233–239.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Anderson J. H., Wickersheim K. A. Near infrared characterization of water and hydroxyl groups on silica surfaces. Surface science, 1964, 2, P. 252–260.</mixed-citation><mixed-citation xml:lang="en">Anderson J. H., Wickersheim K. A. Near infrared characterization of water and hydroxyl groups on silica surfaces. Surface science, 1964, 2, P. 252–260.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Ferrari A.C., Meyer J.C., Scardaci V., Casiraghi C., Lazzeri M., Mauri F., Piscanec S., Jiang D., Novoselov K.S., Roth S., Geim A.K. Raman spectrum of graphene and graphene layers. Phys. Rev. Lett., 2006, 97, P. 18740.</mixed-citation><mixed-citation xml:lang="en">Ferrari A.C., Meyer J.C., Scardaci V., Casiraghi C., Lazzeri M., Mauri F., Piscanec S., Jiang D., Novoselov K.S., Roth S., Geim A.K. Raman spectrum of graphene and graphene layers. Phys. Rev. Lett., 2006, 97, P. 18740.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Khomich A.A., Kudryavtsev O.S., Dolenko T.A., Shiryaev A.A., Fisenko A.V., Konov V.I., Vlasov I.I. Anomalous enhancement of nanodiamond luminescence upon heating. Laser Phys. Lett., 2017, 14, P. 025702.</mixed-citation><mixed-citation xml:lang="en">Khomich A.A., Kudryavtsev O.S., Dolenko T.A., Shiryaev A.A., Fisenko A.V., Konov V.I., Vlasov I.I. Anomalous enhancement of nanodiamond luminescence upon heating. Laser Phys. Lett., 2017, 14, P. 025702.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Berman R. The thermal conductivities of some dielectric solids. Proc. R. Soc. Lond. A, 1951, 208, P. 90–108.</mixed-citation><mixed-citation xml:lang="en">Berman R. The thermal conductivities of some dielectric solids. Proc. R. Soc. Lond. A, 1951, 208, P. 90–108.</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Sergeev O.A., Shashkov A.G., Umanskii A.S. Thermophysical properties of quartz glass. J. Eng. Phys., 1982, 43(6), P. 1375–1383.</mixed-citation><mixed-citation xml:lang="en">Sergeev O.A., Shashkov A.G., Umanskii A.S. Thermophysical properties of quartz glass. J. Eng. Phys., 1982, 43(6), P. 1375–1383.</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Novitsky L.A., Kozhevnikov I.G. The thermophysical properties of materials at low temperatures (handbook). Mashinostroenie, Moscow, 1975 (in Russian).</mixed-citation><mixed-citation xml:lang="en">Novitsky L.A., Kozhevnikov I.G. The thermophysical properties of materials at low temperatures (handbook). Mashinostroenie, Moscow, 1975 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Thermal Conductivity of Solids. Reference Book. Ed. by A.S. Okhotin. Moscow, Energoatomizdat, 1984 (Russian).</mixed-citation><mixed-citation xml:lang="en">Thermal Conductivity of Solids. Reference Book. Ed. by A.S. Okhotin. Moscow, Energoatomizdat, 1984 (Russian).</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Popov P.A., Fedorov P.P., Kuznetsov S.V., Konyushkin V.A., Osiko V.V., Basiev T.T. Thermal conductivity of single crystals of Ca1−xYbxF2+x solid solutions. Dokl. Phys., 2008, 53(4), P. 198–200.</mixed-citation><mixed-citation xml:lang="en">Popov P.A., Fedorov P.P., Kuznetsov S.V., Konyushkin V.A., Osiko V.V., Basiev T.T. Thermal conductivity of single crystals of Ca1−xYbxF2+x solid solutions. Dokl. Phys., 2008, 53(4), P. 198–200.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Sedletskiy I.D. Colloidal-dispersed mineralogy. Ed. A.E. Fersman. Moscow, Leningrad, Academy of Science of the USSR, 1945, 114 p. (in Russian).</mixed-citation><mixed-citation xml:lang="en">Sedletskiy I.D. Colloidal-dispersed mineralogy. Ed. A.E. Fersman. Moscow, Leningrad, Academy of Science of the USSR, 1945, 114 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Yushkin N.P., Askhabov A.M. et. al. Nanomineralogy. Ultra- and micro-dispersed state of mineral matter. St. Petersburg, Nauka, 2005, 581 p. (in Russian).</mixed-citation><mixed-citation xml:lang="en">Yushkin N.P., Askhabov A.M. et. al. Nanomineralogy. Ultra- and micro-dispersed state of mineral matter. St. Petersburg, Nauka, 2005, 581 p. (in Russian).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
