Ankerite - angew. Mineralogie

Ankerite
V - Carbonates

`Name`		`Ankerite` `(Brown Spar)`
`Chemistry`		`CaFe²⁺[CO₃]₂`
`Hardness`		`3.5 - 4`
`Lustre`		`vitreous - pearly`
`Colour`		`brown, brownish yellow, grey, grey brown or white`
`Streak`		`white`
`Density [g/cm³]`		`2.9 - 3.1`
`Crystal habit`		`trigonal-rhomboherdal`
`Cleavage, Fracture`		`[1011] perfect, fracture conchoidal`
`other characteristics and occurrences`		`dolomite-group, intermediate link during replacement of calcite (CaCO₃) by siderite (FeCO₃)`

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