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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-15384</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15384</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Enigmatic faces of certain crystals</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Энигматические грани некоторых кристаллов</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Artemyev</surname>
            <given-names>D. N.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Артемьев</surname>
              <given-names>Д. Н.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Artemyev</surname>
              <given-names>D. N.</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="1909-12-01">
        <day>01</day>
        <month>12</month>
        <year>1909</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1909</year>
      </pub-date>
      <volume>2</volume>
      <issue>4</issue>
      <fpage>275</fpage>
      <lpage>278</lpage>
      <history>
        <date date-type="received" iso-8601-date="1909-06-21">
          <day>21</day>
          <month>06</month>
          <year>1909</year>
        </date>
        <date date-type="accepted" iso-8601-date="1909-08-14">
          <day>14</day>
          <month>08</month>
          <year>1909</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1909-12-01">
          <day>01</day>
          <month>12</month>
          <year>1909</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1909 Д. Н. Артемьев</copyright-statement>
        <copyright-statement xml:lang="en">© 1909 D. N. Artemyev</copyright-statement>
        <copyright-year>1909</copyright-year>
        <copyright-holder xml:lang="ru">Д. Н. Артемьев</copyright-holder>
        <copyright-holder xml:lang="en">D. N. Artemyev</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/15384">https://pmi.spmi.ru/pmi/article/view/15384</self-uri>
      <abstract xml:lang="ru">
        <p>При медленной кристаллизации кобальти - амин - хлоро - диметил - глюксимина при +18-20° С, на некоторых кристаллах этого соединения появляются особые, загадочные грани. Эти грани отличаются прежде всего по своей величине, так как, обыкновенно, они больше других и образованы настолько совершенно, что при измерении можно поручиться за точность до нескольких секунд. Между тем, по своему положению они, по-видимому, не принадлежат к комплексу кристалла, так как символы их необыкновенно сложны, почти иррациональны.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>During the slow crystallization of cobalt - amino - chloro - dimethyl - glucosimine at + 18-20 C, certain crystals of this compound develop special, enigmatic faces. These faces differ primarily by their size, since they are usually larger than the others and formed so perfectly that when measuring, one can rely on measurement accuracy within a few seconds. However, by their orientation they do not seem to belong to the crystal's normal morphological set, since their indices are extraordinarily complex, almost irrational.</p>
      </abstract>
    </article-meta>
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