Mineral Information and Data:

Lokkaite-(Y)
CaY4(CO3)7 • 9H2O [CNMNC approved formula]

Named after Lauri Lokka (1875-1966), mineralogist and chief chemist, Geological Survey of Finland.

IMA status : Approved Species 1970 ()
CLASSIFICATION 
Dana
(8th edition) :
15.04.04.01  
  (15) Hydrated Carbonates
  (15.04)
  (15.04.04)
  
Nickel-Strunz
(10th edition) :
05.CC.15
  (05) Carbonates and Nitrates
  (05.C) Carbonates without Additional Anions, with H2O
  (05.CC) With rare earth elements (REE)
  
Crystal system: Orthorhombic System
Point group (H-M): mm2 — pyramidal
  
  
  

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