Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
4.95-5.02.74-3.00
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
4-55-5.5
2
10
👆🏻
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.