General Information:
Chemical Formula:
YPO4·2(H2O)
Composition:
(Molecular Weight = 219.91 gm)
Yttrium 40.43 % Y
Phosphorus 14.08 % P
Hydrogen 1.83 % H
Oxygen 43.65 % O
Empirical Formula:
Y(PO4)·2(H2O)
IMA Status:
Approved IMA 1987
Locality:
Trefoil mine, near Bodmin, Cornwall, England.
Name Origin:
Named for Arthur Hubert Church (1834-19150, English chemist who described and analyzed the mineral.
Physical Properties:
Cleavage:
[101] Perfect
Color:
colorless, gray, or snow white.
Density:
3.265
Diaphaniety:
Transparent
Habits:
Platy - Sheet forms (e.g. micas)., Acicular - Occurs as needle-like crystals., Aggregates - Made of numerous individual crystals or clusters.
Hardness:
3 - Calcite
Luster:
Vitreous - Pearly
Streak:
white
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