autunite Secondary mineral, Ca(UO2)2(PO4)2.10–12H2O; sp. gr. 3.1; hardness 2.0–2.5; tetragonal; usually bright lemon-yellow to greenish-yellow; yellow streak; vitreous lustre; crystals tabular, square, forming foliated, scaly masses; cleavage perfect, basal; radioactive; fluorescent; occurs with torbernite in the oxidized zone of mineral veins.
More From encyclopedia.com
Anglesite , wulfenite Mineral, PbMoO4; sp. gr. 6.5–7.0; hardness 3; tetragonal; orange-yellow, olive-green, or brown; white streak; resinous lustre; crystals usu… Natrolite , natrolite Member of the zeolite group of minerals, with the formula Na2Al2Si3O10.2H2O; sp. gr. 2.2; hardness 5.0; white; massive, fibrous, or crystal… delftware , delftware •flatware • hardware • glassware •neckwear • headsquare • setsquare •delftware • menswear • shareware •tableware • rainwear • freeware •bea… Muscovite , muscovite muscovite An important rock-forming mineral and member of the mica group with composition K2Al4[Si3AlO10]2(OH,F)4 (see MICAS); when K is re… Square , square / skwe(ə)r/ • n. 1. a plane figure with four equal straight sides and four right angles. ∎ a thing having such a shape or approximately such a… Talc , talc A member of the 2:1 phyllosilicates (sheet silicates) with composition Mg6[Si4O10]2(OH)4; sp. gr. 2.58–2.83; hardness 1 (it has the lowest hardn…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like