discalenohedronn.
/dʌɪskəˌliːnəˈhiːdr(ə)n/, U.S. /ˌdaɪskəˌlinəˈhidrən/ Crystallography. Now rare.
A crystal form consisting of two scalenohedra (mirror images of each other) sharing the same base.
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the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun]
tripyramid1828
trisoctahedron1837
fluoroid1850
sphenoid1855
discalenohedron1872
prism1878
tetrakis-hexahedron1878
galenoid1882
macroprism1883
semi-form1895
tetartohedron1895
tetrakisdodecahedron1895
trichite1900
1872 N. Story-Maskelyne & W. Flight in Jrnl. Chem. Soc. 25 1053 The crystals of the South African vanadinite carry faces of the following forms:..the discalenohedron {201}, which seems to be accompanied by the correlative form {425}.
1878 H. P. Gurney Crystallogr. 63 A double twelve-sided pyramid, the faces of which are symmetrically arranged with respect to each of the seven planes of the hexagonal type of symmetry..is called the discalenohedron.
1998 Crystallogr. Rep. 43 984 Simple forms are..2 and 3 discalenohedra for the stabilizer G02 = 1.
This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).
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