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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">5004</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">The vibrational spectra and the structure of double selenates of sodium</article-title><trans-title-group xml:lang="ru"><trans-title>Колебательные спектры и строения двойных селенатов натрия</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rustembekov</surname><given-names>K T</given-names></name><name xml:lang="ru"><surname>Рустембеков</surname><given-names>К Т</given-names></name></name-alternatives><bio xml:lang="en">The Karaganda state university named after E.A.Buketov</bio><bio xml:lang="ru">Карагандинский государственный университет им. Е.А. Букетова</bio><email>murzabek_b@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">The Karaganda state university named after E.A.Buketov</institution></aff><aff><institution xml:lang="ru">Карагандинский государственный университет им. Е.А. Букетова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2009-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2009</year></pub-date><issue>3</issue><issue-title xml:lang="en">NO3 (2009)</issue-title><issue-title xml:lang="ru">№3 (2009)</issue-title><fpage>110</fpage><lpage>112</lpage><history><date date-type="received" iso-8601-date="2016-09-07"><day>07</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2009, Рустембеков К.Т.</copyright-statement><copyright-year>2009</copyright-year><copyright-holder xml:lang="ru">Рустембеков К.Т.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/5004">https://journals.rudn.ru/engineering-researches/article/view/5004</self-uri><abstract xml:lang="en">For the first time there was synthesized the double selenates of sodium. The composition and the structure of the synthezied compound were determined by methods of X-ray-phase, chemical, atomicemission analysis and IK-spectroscopy.</abstract><trans-abstract xml:lang="ru">Впервые синтезированы двойные селенаты натрия. Методами рентгенофазового, химического, атомно-эмиссионного анализов и ИК-спектроскопией определен состав и строения синтезированных веществ.</trans-abstract><kwd-group xml:lang="en"><kwd>synthesis</kwd><kwd>selenates of sodium-copper (-zinc</kwd><kwd>-cadmium)</kwd><kwd>IR-spectroscopy</kwd><kwd>structure</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>синтез</kwd><kwd>селенаты натрия-меди (-цинка</kwd><kwd>-кадмия)</kwd><kwd>ИК-спектроскопия</kwd><kwd>строение</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Рустембеков К.Т., Дюсекеева А.Т. // Вестник КазНУ им. 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