rhombic form
51crystal — A solid of regular shape and, for a given compound, characteristic angles, formed when an element or compound solidifies slowly enough, as a result either of freezing from the liquid form or of precipitating out of solution, to allow the… …
52Polyhedral compound — A polyhedral compound is a polyhedron that is itself composed of several other polyhedra sharing a common centre. They are the three dimensional analogs of polygonal compounds such as the hexagram. Neighbouring vertices of a compound can be… …
53Stellation — is a process of constructing new polygons (in two dimensions), new polyhedra in three dimensions, or, in general, new polytopes in n dimensions. The process consists of extending elements such as edges or face planes, usually in a symmetrical way …
54Quasiregular polyhedron — A polyhedron which has regular faces and is transitive on its edges but not transitive on its faces is said to be quasiregular.A quasiregular polyhedron can have faces of only two kinds and these must alternate around each vertex. They are given… …
55Order-3 bisected heptagonal tiling — Type Dual semiregular hyperbolic tiling Faces Right triangle Face configuration V4.6.14 …
56Dice — For other uses, see Dice (disambiguation). Four coloured dice showing all six possible sides (on a right handed, 6 sided die with pips) A die (plural dice, from Old French dé, from Latin datum something which is given or played )[1] …
57Truncated octahedron — (Click here for rotating model) Type Archimedean solid Uniform polyhedron Elements F = 14, E = 36, V = 24 (χ = 2) Faces by sides 6 …
58Prism (geometry) — For other uses, see Prism (disambiguation). Set of uniform prisms (A hexagonal prism is shown) Type uniform polyhedron Faces 2+n total: 2 {n} n {4} Edges …
59Potassium sulfate — Arcanite …
60Paulingite — Infobox mineral name = Paulingite category = Zeolite Group boxwidth = boxbgcolor = imagesize = caption = formula = (K,Na,Ca)3 4(Si,Al)21O42 ·17 22H2O molweight = color = Colorless, light yellow, orange, red habit = typically as euhedral crystals… …
