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  2. Crystal twinning - Wikipedia

    en.wikipedia.org/wiki/Crystal_twinning

    Merohedral twinning occurs when the lattices of the contact twins superimpose in three dimensions, such as by relative rotation of one twin from the other. [8] An example is metazeunerite. [9] Contact twinning characteristically creates reentrant faces where faces of the crystal segments meet on the contact plane at an angle greater than 180°. [3]

  3. Law of constancy of interfacial angles - Wikipedia

    en.wikipedia.org/wiki/Law_of_constancy_of...

    The contact goniometer was the first instrument used to measure the interfacial angles of crystals. The International Union of Crystallography (IUCr) gives the following definition: "The law of the constancy of interfacial angles (or 'first law of crystallography') states that the angles between the crystal faces of a given species are constant, whatever the lateral extension of these faces ...

  4. Acta Crystallographica Section A - Wikipedia

    en.wikipedia.org/wiki/Acta_Crystallographica...

    According to the Journal Citation Reports, the journal has a 2023 impact factor of 1.9, ranking it 15th out of 33 journals in the category "Crystallography". [5] The journal attracted attention when its impact factor reached 49.9 in 2009 after the publication of an article on the SHELX crystallographic software by George M. Sheldrick. [6]

  5. Icosahedral twins - Wikipedia

    en.wikipedia.org/wiki/Icosahedral_twins

    Their atomic structure is slightly different from what is found for bulk materials, and contains five-fold symmetries. They have been analyzed in many areas of science including crystal growth, crystallography, chemical physics, surface science and materials science, as well as sometimes being considered as beautiful due to their high symmetry.

  6. Kristallografija - Wikipedia

    en.wikipedia.org/wiki/Kristallografija

    The journal publishes original articles, short communications, and reviews on various aspects of crystallography: crystallographic symmetry; theory of crystalline structures; diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV–Vis and IR spectroscopy ...

  7. Acta Crystallographica Section B - Wikipedia

    en.wikipedia.org/wiki/Acta_Crystallographica...

    Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientific articles on structural science. [1] [2] According to the journal: "Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of ...

  8. Crystallography Reviews - Wikipedia

    en.wikipedia.org/wiki/Crystallography_Reviews

    Crystallography Reviews is a quarterly peer-reviewed scientific journal publishing review articles on all aspects of crystallography. It is published by Taylor & Francis . The editor-in-chief is Petra Bombicz.

  9. Macle - Wikipedia

    en.wikipedia.org/wiki/Macle

    Macle is a term used in crystallography. [1] It is a crystalline form, twin-crystal or double crystal (such as chiastolite). It is crystallographic twin according to the spinel twin law and is seen in octahedral crystals or minerals such as diamond and spinel. The twin law name comes from the fact that is commonly observed in the mineral spinel ...