| Anapaite | |
|---|---|
 Anapaite from Ukraine | |
| General | |
| Category | Phosphate minerals |
| Formula | Ca2Fe2+(PO4)2·4H2O |
| IMA symbol | Anp[1] |
| Strunz classification | 8.CH.10 |
| Crystal system | Triclinic |
| Crystal class | Pinacoidal (1) |
| Space group | Triclinic H-M symbol: (1) Space group: P1 |
| Unit cell | a = 6.447, b = 6.816 c = 5.898 [Å]; α = 101.64° β = 104.24°, γ = 70.76°; Z = 1 |
| Identification | |
| Color | Green, greenish white to colorless |
| Crystal habit | Tabular to bladed crystals, radiating clusters, incrustations, fibrous, and in nodules |
| Cleavage | Perfect on {001}, distinct on {010} |
| Tenacity | Flexible |
| Mohs scale hardness | 3.5 |
| Luster | Vitreous |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 2.8 |
| Optical properties | Biaxial (+) |
| Refractive index | nα=1.602, nβ=1.613, nγ=1.649 |
| Birefringence | δ = 0.047 |
| Pleochroism | Not visible |
| 2V angle | Measured: 52° to 56° |
| References | [2][3][4] |
Anapaite is acalcium–ironphosphate mineral with formula: Ca2Fe2+(PO4)2·4H2O. It is a mineral that typically occurs in cavities infossil bearingsedimentary rocks. It is also found in phosphate bearingiron ores and rarely inpegmatites. It is commonly found withgoethite,siderite andvivianite.[2]
It was named after thetype locality on theBlack Sea coastal region ofAnapa,Taman Peninsula,Russia.[2] Noted localities includeKertch (Crimea,Ukraine),Bellver de Cerdanya (Lleida,Catalonia,Spain)[5] and Valdarno, Tuscany, Italy.
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