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Brushite

Year of discovery: 1865 (Aves island, Venezuela), 1972 (Japan)

Locality list: 11 localities of brushite

• CaHPO₄,2H₂O
• [Ca²⁺][HPO₄]^2-,2H₂O

• Class: Phosphate - Hydrate
• Soluble in: HCl
• Electrical: Piezoelectric

• HPO₄ => HAsO₄: Pharmacolite
• HPO₄ => SO₄: Gypsum

• Color: Colorless, Pale yellow
• Streak: White
• Luster: Pearly
• Diaphaneity: Transparent, Translucent

• Habit: Powder

• Cleavage: Perfect on {010} and {001} (2 planes)
• Hardness: 2.5
• Density: 2.3

• System: Monoclinic
• Group: 2/m, I2/a
• Lattice: a=6.3, b=15.2, c=5.8, β=116.5