Mineral Information and Data:

Artsmithite
Hg1+4Al(PO4)1.74(OH)1.78 [CNMNC approved formula]

Named for Arthur (Art) E. Smith (1935-), American petroleum geologist from Houston, Texas who collected the original sample.

IMA status : Approved Species 2003 (IMA2002-039)
CLASSIFICATION 
Dana
(8th edition) :
41.05.20.01  (This Dana# Added)
  (41) Anhydrous Phosphates Containing Hydroxyl or Halogen
  (41.05) where (A B)2 (XO4) Zq
  (41.05.20)
  
Nickel-Strunz
(10th edition) :
08.BO.40
  (08) Phosphates, Arsenates, Vanadates
  (08.B) Phosphates, etc. with Additional Anions, without H2O
  (08.BO) With only large cations, (OH, etc.):RO4 about 1:1
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 17.022Å, b = 9.074Å, c = 7.015Å β = 101.2°
Crystal Habit: Crystals are short prismatic, to 5 μm, in granular aggregates.
  
Color: Turquoise-blue to sky-blue
Diaphaneity: Translucent
Luster: Earthy
Hardness (Mohs): 1.5 -2
Measured Density: 2.85 (calculated) g/cm3
  
Geologic Setting: A weathering product of a nickel-rich iron meteorite.
Mineral Association: Reevesite, honessite, akaganeite, hematite, goethite, magnetite
  

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