Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
4.76-5.032.74-3.00
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
None
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
5.5-6.55-5.5
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.