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#hemihedrism
ynop6gwkazk · 1 year
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ghminerals · 7 years
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Phenakite or phenacite is a rare nesosilicate mineral consisting of beryllium orthosilicate, Be2SiO4. Occasionally used as a gemstone, phenakite occurs as isolated crystals, which are rhombohedral with parallel-faced hemihedrism, and are either lenticular or prismatic in habit: the lenticular habit is determined by the development of faces of several obtuse rhombohedra and the absence of prism faces. There is no cleavage, and the fracture is conchoidal. The Mohs hardness is high, being 7.5 - 8. In general appearance the mineral is not unlike quartz, for which indeed it has been mistaken. It is used a gemstone. Its name comes from the Greek phenakos, meaning "deceiver" due to its close visual similarity to quartz. www.goldenhourminerals.com
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Learn how to pronounce Hemihedral in English --- HEMIHEDRAL Pronunciation of Hemihedral: /,hemɪ'hiːdrəl/ adjective Definition of Hemihedral: having half the faces required by complete symmetry — compare holohedral, tetartohedral ★ http://Learn2Pronounce.com ★ How to pronounce Hemihedral | English pronunciation: https://youtu.be/6etIzZJkkB4
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thepotterpapers · 5 years
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Harry Potter and the use of noncrystallographic symmetry averaging to solve structures from data affected by perfect hemihedral twinning
Harry Potter and the use of noncrystallographic symmetry averaging to solve structures from data affected by perfect hemihedral twinning
— Potter Papers (@PotterPapers) May 10, 2019
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Learn how to pronounce Diploid in English correctly - pronunciation of Diploid ★ http://Learn2Pronounce.com ★ Click show more for definition of Diploid ___________ DIPLOID Pronunciation: /'dɪplɔɪd/ (n.) Definition: A solid bounded by twenty-four similar quadrilateral faces. It is a hemihedral form of the hexoctahedron. Diploid pronunciation and definition: https://youtu.be/7JTjlYvdo88
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