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Anapaite

Type Locality
Zheleznyi Rog (Zheleznaya balka), Anapa, Taman Peninsula, Krasnodarskiy Kray, Russia
Mineral Data
Ca2Fe2+(PO4)2·4H2O
Strunz: 
8.CH.10
Physical Properties
Colour: 
Green, greenish-white, milky white, colorless; colourless to light green in transmitted light.
Crystal System: 
Triclinic
Streak: 
White
Hardness: 
3.5
Tenacity: 
flexible
Classification/Family
Chemical class: 
Phosphate
IMA status: 
Approved, Grandfathered
IMA symbol: 
Anp
Year of discovery: 
1902
Chemistry
Cations
  • Ca²⁺
  • Fe²⁺
Anions
  • PO₄³⁻
Elements: 
Ca, Fe, H, O, P
Crystallography
Space group: 
P-1 (No. 2)
Point group: 
-1
Unit cell: 
a = 6.447 Å, b = 6.816 Å, c = 5.898 Å, α = 101.64°, β = 104.24°, γ = 70.76°, Z = 1
Properties
Density: 
2.81 g/cm³ (measured); 2.81 g/cm³ (calculated)
Lustre: 
Vitreous
Diaphaneity: 
Transparent
Cleavage: 
On {001}, perfect; on {010}, distinct.
Optical character: 
Biaxial (+)
Refractive index: 
α = 1.602, β = 1.613, γ = 1.649
Birefringence: 
0.037
2V: 
52–56° (measured); 60° (calculated)
Dispersion: 
r > v marked
Pleochroism: 
Not Visible
Extinction: 
X (-119°, 81°); Y (147°, 70°), Z (-6°, 21°)
Photos