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Svabite | |
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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 isomorphous with apatite and mimetite.[3]
It got its name in 1891 by Hjalmar Sjögren after Anton von Swab.[4]