| Anapaite | |
|---|---|
 Anapaite from Ukraine | |
| General | |
| Category | Phosphate minerals |
| Formula (repeating unit) | 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 a calcium–iron phosphate mineral with formula: Ca2Fe2+(PO4)2·4H2O. It is a mineral that typically occurs in cavities in fossil bearing sedimentary rocks. It is also found in phosphate bearing iron ores and rarely in pegmatites. It is commonly found with goethite, siderite and vivianite.[2]
It was named after the type locality on the Black Sea coastal region of Anapa, Taman Peninsula, Russia.[2] Noted localities include Kertch (Crimea, Ukraine), Bellver de Cerdanya (Lleida, Catalonia, Spain)[5] and Valdarno, Tuscany, Italy.
See also
- A list of minerals with associated Wikipedia articles
- List Viewing (in German)
References
Wikimedia Commons has media related to Anapaite.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- 1 2 3 Anapaite on Mindat.org
- ↑ Anapaite data on Webmineral.com
- ↑ Anapaite in the Handbook of Mineralogy
- ↑ Calvo, Miguel (2015). Minerales y Minas de España. Vol. VII. Fosfatos, Arseniatos y Vanadatos (in Spanish). Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. pp. 319–321.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.