Mineral Information and Data:

Bariosincosite
Ba(VO)2(PO4)2 • 4H2O [CNMNC approved formula]

Named from Barium in composition and relationship to sincosite.

IMA status : Approved Species 1999 (IMA1998-047)
CLASSIFICATION 
Dana
(8th edition) :
42.11.19.02  (This Dana# Added)
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.11) where (AB)4 (XO4)3 Zq · x(H2O)
  (42.11.19) Sincosite Group
  
Nickel-Strunz
(10th edition) :
08.CJ.65
  (08) Phosphates, Arsenates, Vanadates
  (08.C) Phosphates without Additional Anions, with H2O
  (08.CJ) With only large cations
  
Crystal system: Tetragonal System
Point group (H-M): 4/m — dipyramidal
Space group: P4/n
Unit cell: a = 9.031 (6) Å, c = 12.755(8) Å
Crystal Habit: As irregular clusters , very thin platey crystals up to 2-5 μm across and 2 to 5 μm thick. The tetragonal crystals are tabular on {001} and the other form present is {100}.
  
Color: Pale green
Diaphaneity: Transparent
Luster: Vitreous
Hardness (Mohs): 3
Measured Density: 3.306 (calculated) g/cm3
Streak: Very pale green
  
Geologic Setting: Appears to have formed under supergene or low-temperature late-stage hydrothermal conditions (Spring Creek Mine, near Wilmington, South Australia).
Mineral Association: Quartz, cuprite, native copper, fluorapatite, whitlockite, baryte and springcreekite (Spring Creek Mine, near Wilmington, South Australia)
  

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