Tenacity
Brittle
-
Solubility
H₂SO₄
-
Durability
-
-
Specific Gravity
2.74-3.003.16-3.43
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
Distinct on {0001} imperfect on {11 2 0}
{110} Good, {110} Good
Mohs Hardness
5-5.55-6
2
10
👆🏻
Chemical Composition
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)