Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
2.6-3.32.74-3.00
1
7.18
👆🏻
Fracture
Lamellar
Uneven
Cleavage
Perfect 001
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
2-2.55-5.5
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.