| Warwickite | |
|---|---|
 Warwickite sample | |
| General | |
| Category | Borate mineral |
| Formula | (Mg,Fe2+)3Ti[O,BO3]2 |
| IMA symbol | Wwk[1] |
| Strunz classification | 6.AB.20 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pnam |
| Identification | |
| Color | dark brown, grey to black¨ |
| Cleavage | perfect on {100} |
| Fracture | irregular/uneven |
| Mohs scale hardness | 3-4 |
| Luster | sub-Vitreous, pearly, sub-metallic, dull |
| Streak | bluish black |
| Specific gravity | 3.34 - 3.36 |
| References | [2] |
Warwickite is anironmagnesiumtitaniumborate mineral with the chemical formula(MgFe)3Ti(O,BO3)2orMg(Ti,Fe3+,Al)(BO3)O. It occurs as brown to black prismaticorthorhombic crystals which are vitreous and transparent. It has aMohs hardness of 3 to 4 and aspecific gravity of 3.36.[3][4]
It occursmetasomatizedlimestoneskarns and inlamproite andcarbonatiteveinlets. It was first described in 1838 nearWarwick,Orange County, New York. It has also been reported fromBancroft, Ontario; inMurcia Province,Spain; inSiberia and nearPyongyang,North Korea.[5]
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