crystal class
71Piezoelectricity — is the ability of some materials (notably crystals and certain ceramics, including bone) to generate an electric potentialPrinciples of Instrumental Analysis. 6th Edition, 2007. Skoog, Holler, and Crouch. Chapter 1, Sec. 1C 4, Pg. 9.] in response …
72Space group — In mathematics and geometry, a space group is a symmetry group, usually for three dimensions, that divides space into discrete repeatable domains. In three dimensions, there are 219 unique types, or counted as 230 if chiral copies are considered… …
73point group — Crystall. a class of crystals determined by a combination of their symmetry elements, all crystals left unchanged by a given set of symmetry elements being placed in the same class. Also called symmetry class. [1900 05] * * * ▪ crystallography… …
74Stilbite — from Kiui Island, Alaska, USA General Category Zeolite Chemical formul …
75Marrite — General Category Sulfosalt mineral Chemical formula PbAgAsS3 Strunz classification 02.JB.15 Crystal symmetry Monoclinic 2 …
76luminescence — luminescent, adj. /looh meuh nes euhns/, n. 1. the emission of light not caused by incandescence and occurring at a temperature below that of incandescent bodies. 2. the light produced by such an emission. [1885 90; < L lumin (see LUMEN) +… …
77Mendipite — from the Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England. Specimen size 2 cm General Category Halides …
78Metazeunerite — crystals to 7 mm on smoky quartz, Erongo Region, Namibia General Category …
79Marialite — General Category Silicate mineral Chemical formula Na4Al3Si9O24Cl Crystal symmetry Tetragonal 4/m Unit cell a …
80Nambulite — Gem quality nambulite from the Kombat Mine, Grootfontein District of Namibia (size: 0.7 x 0.6 x 0.4 cm) General Category Inosilicate …
