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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15496</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15496</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Статьи</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Articles</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">The enigmatic faces of quartz</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Энигматические грани кварца</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Fedorov</surname>
            <given-names>E. S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Федоров</surname>
              <given-names>Е. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Fedorov</surname>
              <given-names>E. S.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1912-12-01">
        <day>01</day>
        <month>12</month>
        <year>1912</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1912</year>
      </pub-date>
      <volume>3</volume>
      <fpage>170</fpage>
      <lpage>170</lpage>
      <history>
        <date date-type="received" iso-8601-date="1912-06-13">
          <day>13</day>
          <month>06</month>
          <year>1912</year>
        </date>
        <date date-type="accepted" iso-8601-date="1912-08-16">
          <day>16</day>
          <month>08</month>
          <year>1912</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1912-12-01">
          <day>01</day>
          <month>12</month>
          <year>1912</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1912 Е. С. Федоров</copyright-statement>
        <copyright-statement xml:lang="en">© 1912 E. S. Fedorov</copyright-statement>
        <copyright-year>1912</copyright-year>
        <copyright-holder xml:lang="ru">Е. С. Федоров</copyright-holder>
        <copyright-holder xml:lang="en">E. S. Fedorov</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/15496">https://pmi.spmi.ru/pmi/article/view/15496</self-uri>
      <abstract xml:lang="ru">
        <p>На энигматические грани практически можно смотреть как на иррациональные, недопускаемые основными законами кристаллографии. Предположение их иррациональности подтверждено и их зарастанием при контакте с важною гранью комплекса, смоченном насыщенным раствором вещества, причем часть последней грани подвергается растворению. Кроме этой характеристики, энигматические грани характеризуются своею одиночностью и неповторяемостью.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Enigmatic faces can practically be viewed as irrational, not allowed by the fundamental laws of crystallography. The assumption of their irrationality is further confirmed by their overgrowth upon contact with an important face of the complex, wetted by a saturated solution of the substance, whereby a part of the latter face is subject to dissolution. In addition to this characteristic, enigmatic faces are distinguished by their singularity and non-repetitiveness.</p>
      </abstract>
    </article-meta>
  </front>
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