Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.58-2.744.33-4.42
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann, Splintery
-
Cleavage
{100} Distinct, {110} Distinct
Perfect
Mohs Hardness
5.5-64.5
2
10
👆🏻
Chemical Composition
Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references
Ca(Nd,Ce,La) 2(CO 3) 3F 2Ulrich Henn and Claudio C.