Mineral Information and Data:

Lopezite
K2Cr2O7 [CNMNC approved formula]

Named for Emiliano Lopez Saa (1871-1959), Iquique, Chile, Chilean mining engineer and mineral collector long associated with the Chilean nitrate industry.

IMA status : Valid species (Pre-IMA 1937) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
35.02.01.01  
  (35) Anhydrous Chromates
  (35.02) where (A+)2 X2O7
  (35.02.01)
  
Nickel-Strunz
(10th edition) :
07.FD.05
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.F) Chromates
  (07.FD) Dichromates
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  
Other Properties: H2O Soluble.

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