Tenacity
Brittle
-
Solubility
H₂SO₄
-
Durability
-
-
Specific Gravity
2.74-3.002.74-2.76
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Distinct on {0001} imperfect on {11 2 0}
{010} Perfect, {001} Distinct
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)