Mineral Information and Data:

Defernite
Ca6(CO3,SiO4)2(OH)7-8 [CNMNC approved formula]

Named for Jacques Deferne, Curator of Mineralogy, Museum of Natural History, Geneva, Switzerland.

IMA status : Approved Species 1978 ()
CLASSIFICATION 
Dana
(8th edition) :
16b.04.02.01  
  (16b) Carbonates - Hydroxyl or Halogen
  (16b.04) where (A)m (B)n (XO3)p Zq · x(H2O), with (m+n):p=8:1
  (16b.04.02)
  
Nickel-Strunz
(10th edition) :
05.BA.25
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BA) With Cu, Co, Ni, Zn, Mg, Mn
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

<<< BACK TO MINERAL SEARCH