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<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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestich-190</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="ru"><subject>ФИЗИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICAL CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>ФАЗОВЫЕ ПРЕВРАЩЕНИЯ ПРИРОДНЫХ ЦЕОЛИТОВ ПРИ КИСЛОТНОЙ И ЩЕЛОЧНОЙ ОБРАБОТКАХ</article-title><trans-title-group xml:lang="en"><trans-title>PHASE TRANSFORMATIONS OF NATURAL ZEOLITES under ACID AND ALKALI TREATMENTS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саргсян</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Sargsyan</surname><given-names>A. O.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саргсян</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sargsyan</surname><given-names>O. A.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арутюнян</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Harutyunyan</surname><given-names>L. R.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бадалян</surname><given-names>Г. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Badalyan</surname><given-names>G. G.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Петросян</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrosyan</surname><given-names>I. A.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арутюнян</surname><given-names>Р. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Harutyunyan</surname><given-names>R. S.</given-names></name></name-alternatives><email xlink:type="simple">info@ysu.am</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецова</surname><given-names>Т. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Kouznetsova</surname><given-names>T. F.</given-names></name></name-alternatives><email xlink:type="simple">kouzn@igic.bas-net.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванец</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanets</surname><given-names>A. I.</given-names></name></name-alternatives><email xlink:type="simple">tatyana.fk@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ереванский государственный университет</institution></aff><aff xml:lang="en"><institution>Yerevan State University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт общей и неорганической химии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>06</day><month>08</month><year>2016</year></pub-date><volume>0</volume><issue>2</issue><fpage>37</fpage><lpage>44</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Саргсян А.О., Саргсян О.А., Арутюнян Л.Р., Бадалян Г.Г., Петросян И.А., Арутюнян Р.С., Кузнецова Т.Ф., Иванец А.И., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Саргсян А.О., Саргсян О.А., Арутюнян Л.Р., Бадалян Г.Г., Петросян И.А., Арутюнян Р.С., Кузнецова Т.Ф., Иванец А.И.</copyright-holder><copyright-holder xml:lang="en">Sargsyan A.O., Sargsyan O.A., Harutyunyan L.R., Badalyan G.G., Petrosyan I.A., Harutyunyan R.S., Kouznetsova T.F., Ivanets 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://vestichem.belnauka.by/jour/article/view/190">https://vestichem.belnauka.by/jour/article/view/190</self-uri><abstract><p>Методами дифракции рентгеновских лучей и жидкостной пикнометрии изучено изменение свойств цеолитов Ноемберянского месторождения (Армения) после их обработки щелочными и кислотными растворами (1–6 моль/л). Установлено, что при концентрациях натрия гидроксида ≥ 2 моль/л изменяются химический состав и удельный сум­марный объем пор клиноптилолита, а также образуются новые фазы, такие как содалит, жисмондин и филлипсит. Выявлено, что увеличение концентрации соляной кислоты до ≈ 6 моль/л приводит к изменению размеров и форм сорбционных каналов клиноптилолита, а свыше этих значений – к его разрушению. Методом низкотемпературной адсорбции–десорбции азота доказано наличие мезопористой составляющей в образцах клиноптилолитовой породы.</p></abstract><trans-abstract xml:lang="en"><p>The change of zeolite properties of the ‘Noyemberyanskoe’ deposit (Armenia) after their processing with alkaline and acidic solutions (1­6 mol/dm3 ) has been studied by X­ray diffraction and dip pycnometry. It has been established that chemical composition and specific total pore volume of clinoptilolite were changed, and also new phases, such as sodalite, gismondine and fillipsite, were formed at sodium hydroxide concentration of ≥ 2 mol/dm3 . It has been found that increasing the hydrochloric acid concentration up to ≈ 6 mol/dm3 leads to size and form change of clinoptilolite sorption channels, and further increase causes its destruction. The method of low­temperature nitrogen adsorption­desorption proved the presence of mesoporous constituent in a clinoptilolite rock.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>природные цеолиты</kwd><kwd>клиноптилолит</kwd><kwd>жидкостная пикнометрия</kwd><kwd>адсорбция</kwd><kwd>объем пор</kwd><kwd>микро-поры</kwd><kwd>мезопоры</kwd></kwd-group><kwd-group xml:lang="en"><kwd>natural zeolites</kwd><kwd>clinoptilolite</kwd><kwd>dip pycnometry</kwd><kwd>adsorption</kwd><kwd>pore volume</kwd><kwd>micropores</kwd><kwd>mesopores</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Armbruster, T. Dehydration Mechanism of Clinoptilolite and Heulandite: Single-Crystal X-Ray Study of Na-Poor, Ca-, K-, Mg-Rich Clinoptilolite at 100 K // Amer. Mineralog. – 1993. – Vol. 78. – P. 260–265.</mixed-citation><mixed-citation xml:lang="en">Armbruster, T. 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