Mineral Information and Data:

Chivruaiite
Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 • 13-14H2O [CNMNC approved formula]

Named for the locality: Chivruai river valley, Lovozero massif, Kola Peninsula, Russia.

IMA status : Approved Species 2004 ()
CLASSIFICATION 
Dana
(8th edition) :
66.03.01.07  (This Dana# Added)
  (66) Inosilicate Double-Width Unbranched Chains, W=2
  (66.03) with chains P>2
  (66.03.01) P=3
  
Nickel-Strunz
(10th edition) :
09.DG.45
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DG) with 3-periodic single and multiple chains
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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