General Information:
Chemical Formula:
Fe+++4(PO4)3(OH)3·5(H2O)
Composition:
(Molecular Weight = 649.40 gm)
Iron 34.40 % Fe
Phosphorus 14.31 % P
Hydrogen 2.02 % H
Oxygen 49.27 % O
Empirical Formula:
Fe3+4(PO4)3(OH)3·5(H2O)
Locality:
Tintic Standard mine, Tintic district, Utah
Name Origin:
Named for the locality.
Physical Properties:
Color:
white, light brown, or pale yellowish green.
Density:
2.8 - 2.94, Average = 2.87
Habits:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Nodular - Tuberose forms having irregular protuberances over the surface., Cryptocrystalline - Occurs as crystals too small to distin
Hardness:
2.5 - Finger Nail
Luster:
Earthy (Dull)
Streak:
white
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