Mineral Information and Data:

Bariopharmacosiderite
Ba0.5Fe3+4(AsO4)3(OH)4 • 5H2O [CNMNC approved formula]

Named in 1966 as the barium analog of pharmacosiderite.

IMA status : Renamed IMA Approved; 2008 ()
CLASSIFICATION 
Dana
(8th edition) :
42.08.01.03  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.08) where (AB)7 (XO4)4 Zq · x(H2O)
  (42.08.01) Pharmacosiderite Group
  
Nickel-Strunz
(10th edition) :
08.DK.10
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DK) With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
  
Crystal system: Tetragonal System
Point group (H-M): 42m (or 4 2m) — scalenohedral
Space group: P42m
Unit cell: a = 7.97Å, c = 8.1Å
Crystal Habit: Cubes up to 50 microns
  
Color: Brown, yellow, reddish brown, green, bluish
Diaphaneity: Transparent, Translucent
Hardness (Mohs): ~2.5
Measured Density: 3.05 g/cm3
Cleavage: (100) and (001), both good
Fracture: Conchoidal
  
  
Synonyms/varieties: Barium-Pharmacosiderite

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