PHOSPHATE Flashcards
Ca5(PO4)3(F,Cl,OH)
Apatite
Hexagonal, commonly in crystals of long prismatic habit; some short prismatic or tabular. Also massive granular to compact masses.
Apatite
What is the cleavage of apatite?
Basal poor
What is the hardness of apatite?
5 (can be scratched by a knife)
What is the specific gravity of apatite?
3.15 - 3.20
What is the color of apatite?
Usually some shade of green or brown; also blue, violet, colorless. Luster vitreous to subresinous
Widely distributed in igneous, metamorphic, and sdimentary rocks. It is also found in pegmatites and other veins, probably of hydrothermal origin.
Apatite
T or F. Phosphate materials of bones and teeth are members of the apatite group.
T
A massive, cryptocrystalline type) constitutes the bulk of phosphorite or phosphate rock.
Apatite
LiAl(PO4)(F,OH)
Amblygonite
Triclinic but usually occurs in coarse, cleavable masses.
Amblygonite
What is the cleavage of amblygonite?
{100} perfect
What is the specific gravity of amblygonite?
3.0 - 3.1
What is the color of the amblygonite?
White to pale green or blue, rarely yellow.
Found mainly in Li-bearing granite pegmatites in association with spodumene, tourmaline, lepidolite, and apatite.
Amblygonite
CuAl6(PO4)4(OH)8·4H2O
Turquoise
Rarely in minute triclinic crystals, usually cryptocrystalline. Massive compact, reniform, stalactitic.
Turquoise
What is the cleavage of turquoise?
Basal perfect
What is the hardness of turquoise?
6
What is the specific gravity of turquoise?
2.6 - 2.8
What is the common color of turquoise?
Blue, bluish green, green. Luster waxlike.
