Tenacity
Brittle
-
Solubility
H₂SO₄
-
Durability
-
-
Specific Gravity
2.74-3.004.76-5.03
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Distinct on {0001} imperfect on {11 2 0}
None
Mohs Hardness
5-5.55.5-6.5
2
10
👆🏻
Chemical Composition
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)