Mineral Information and Data:

Hapkeite
Fe2Si [CNMNC approved formula]

Named for Bruce Hapke (emeritus, University of Pittsburgh). who first predicted the presence of vapor-deposited elemental Fe as coatings on lunar soil grains.

IMA status : Approved Species 2004 ()
CLASSIFICATION 
Dana
(8th edition) :
01.01.23.04  (This Dana# Added)
  (01) Native Elements
  (01.01) with metallic elements other than the platinum group
  (01.01.23) Suessite Group silicides
  
Nickel-Strunz
(10th edition) :
01.BB.35
  (01) Elements
  (01.B) Metallic Carbides, Silicides, Nitrides and
  (01.BB) Silicides
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
  
  
  

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