| Kovdorskite | |
|---|---|
 | |
| General | |
| Category | Phosphate minerals |
| Formula (repeating unit) | Mg2PO4(OH)·3H2O |
| IMA symbol | Kov |
| Strunz classification | 8.DC.22 |
| Dana classification | 43.05.08.01 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/n |
| Unit cell | a = 10.35, b = 12.90 c = 4.73 ; Z = 4 |
| Identification | |
| Color | Translucent white to pale blue to bright pink |
| Crystal habit | Rough prismatic |
| Fracture | Conchoidal to uneven |
| Mohs scale hardness | 4 |
| Luster | Vitreous |
| Specific gravity | 2.28 (measured), 2.30 (calculated) |
| Optical properties | Biaxial (-) |
| Refractive index | nα = 1.527 nβ = 1.542 nγ = 1.549 |
| Birefringence | δ = 0.022 |
| 2V angle | 80°-82° (measured) |
| Dispersion | r > v, very weak |
| References | |
Kovdorskite, Mg2PO4(OH)·3H2O, is a rare, hydrated, magnesium phosphate mineral. It was first described by Kapustin et al., and is found only in the Kovdor Massif near Kovdor, Kola Peninsula, Russia. It is associated with collinsite, magnesite, dolomite, hydrotalcite, apatite, magnetite, and forsterite.
References
- 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.
- ^ Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America .
- Ovchinnikov V E, Soloveva L P, Pudovkina Z V, Kapustin Y L, Belov N V (1980) The crystal structure of kovdorskite Mg2(PO4)(OH)·3(H2O), Doklady Akademii Nauk SSSR, 255, 351-354 .
- ^ Kovdorskite on Mindat.org
- Kovdorskite data on Webmineral
- Kapustin, Y. L., Bykova, A. V. & Pudovkina, Z. V. (1980). Zap. Vses. Mineral. Ova. 109, 341-347
Further reading
- Subbotin, R. P. L. V. V., & Pakhomovsky, Y. A. (1998). A new type of scandium mineralization in phoscorites and carbonatites of the Kovdor massif, Russia. Canadian Mineralogist 36:971-980.
- Yakovenchuk V N, Ivanyuk G Y, Mikhailova Y A, Selivanova E A, Krivovichev S V (2006) Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia, The Canadian Mineralogist 44, 117-123