Svabite
| Svabite | |
|---|---|
 | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | Ca5(AsO4)3(F,OH) |
| IMA symbol | Sva[1] |
| Identification | |
| Color | Colorless yellowish white, gray, grayish green, colorless to pale lilac in transmitted light |
| Crystal habit | As stout prismatic hexagonal crystals, often modified by several bipyramids, up to 5 mm; also massive |
| Cleavage | Indistinct on {1010} |
| Fracture | Irregular/uneven |
| Tenacity | Brittle |
| Mohs scale hardness | 4.0 – 5.0 |
| Density | 3.50 – 3.80 (g/cm3) |
| Refractive index | 1.698 – 1.706 Uniaxial (−) |
| Other characteristics | Soluble in dilute acids |
Svabite is a arsenate mineral.[2] The mineral is rare and is also a member of the apatite group.[3]
It is named in 1891 by Hjalmar Sjögren after Anton von Swab.[4]
The mineral is isomorphous with apatite and mimetite.[3]
Occurrence[edit]
Svabite can be found in countries like Sweden or Germany.[3]
The mineral is rare in calc-silicate skarns and arsenate analogue.[5]
References[edit]
- ^ 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.
- ^ "Svabite | mineral". Encyclopedia Britannica. Retrieved 3 September 2021.
- ^ a b c "Svabite". National Gem Lab. 25 March 2017. Retrieved 5 September 2021.
- ^ "Svabite". www.mindat.org. Retrieved 5 September 2021.
- ^ Ptáček, Petr (13 April 2016). Apatites and their Synthetic Analogues: Synthesis, Structure, Properties and Applications. BoD – Books on Demand. p. 36. ISBN 978-953-51-2265-4.