Altaite also known as lead telluride is a yellowish white mineral with an isometric crystal structure. Altaite is in the galena group of minerals as it shares many of properties of galena but altaite has an unusually high density for any mineral. Altaite and other rare tellurides are classified in the sulfide mineral class. Minerals are natural compounds formed through geological processes. ... General Name, Symbol, Number lead, Pb, 82 Chemical series poor metals Group, Period, Block 14, 6, p Appearance bluish white Atomic mass 207. ... General Name, Symbol, Number tellurium, Te, 52 Series metalloids Group, Period, Block 16 (VIA), 5, p Density, Hardness 6240 kg/m3, 2. ... The molecular mass of a substance (less accurately called molecular weight and abbreviated as MW) is the mass of one molecule of that substance, relative to the unified atomic mass unit u (equal to 1/12 the mass of one atom of carbon-12). ... In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In any mineral, its streak refers to the color of its powder. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... A fracture is the separation of a body into two, or more, pieces under the action of stress. ... Look up cleave or cleavage in Wiktionary, the free dictionary Cleavage has several common meanings, all related to the formation of a line between two parts: Cleavage - partial exposure of the separation between a womans breasts. ... In mineralogy, shape and size give rise to descriptive terms applied to the typical appearance, or habit of crystals. ... The term isometric comes from the Greek for having equal measurement and is a descriptive word associated with several topics: Isometric projection, a method for the visual representation of three-dimensional objects in two dimensions, is a form of orthographic projection, or more specifically, an axonometric projection. ... Galena is a lead ore. ...

Altaite was discovered in 1845 in the Altai Mountains. Besides these mountains altaite can also be found in Zyrianovsk in Kazakhstan, Ritchie Creek Deposit Price County in Wisconsin Koch-Bulak Gold deposit in Kazakhstan, Moctezuma in Mexico, Coquimbo in Chile plus many more other places. 1845 was a common year starting on Wednesday (see link for calendar). ... For the republic in Russia, see Altai Republic. ... One of the periods of glaciation was also termed the Wisconsin glaciation. ... General Name, Symbol, Number Gold, Au, 79 Chemical series transition metals Group, Period, Block 11 (IB), 6, d Density, Hardness 19300 kg/m3, 2. ... Moctezuma II (also Motecuhzoma Xocoyotzin) (1466-1520) was an Aztec ruler or tlatoani c. ... Coquimbo is Chiles fourth administrative region from north to south. ...

See also

List of minerals Gem animals. ...