Mineral Information and Data:

Calvertite
Cu5Ge0.5S4 [CNMNC approved formula]

Named for Lauriston (Larry) Derwent Calvert (1924-1993) of the National Research Council, Ottawa, Canada.

IMA status : Approved Species 2006 ()
CLASSIFICATION 
Dana
(8th edition) :
02.05.10.02  
  (02) Sulfides - Including Selenides and Tellurides
  (02.05) where Am Bn Xp, with (m+n):p=3:2
  (02.05.10)
  
Nickel-Strunz
(10th edition) :
02.CA.15
  (02) Sulfides
  (02.C) Metal Sulfides, M:S = 1:1 (and similar)
  (02.CA) With Cu
  
Crystal system:  
Point group (H-M):
  
  
  

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