Mineral Information and Data:

Baricite
Mg3(PO4)2 • 8H2O [CNMNC approved formula]

Named to honor Dr. Ljudevit Baric, former Director of the Mineralogical Museum and Professor of Mineralogy, University of Zagreb, Zagreb, Croatia.

IMA status : Approved Species 1976 (IMA1975-027)
CLASSIFICATION 
Dana
(8th edition) :
40.03.06.02  
  (40) Hydrated Phosphates
  (40.03) where (A++)3 (XO4)2 · x(H2O)
  (40.03.06) Vivianite Group
  
Nickel-Strunz
(10th edition) :
08.CE.40
  (08) Phosphates, Arsenates, Vanadates
  (08.C) Phosphates without Additional Anions, with H2O
  (08.CE) With only medium-sized cations, RO4:H2O about 1:2.5
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 10.075 Å, b = 13.416-13.434 Å, c = 4.622-4.670 Å; beta= 104°22'-104°52', Z = 2
Crystal Habit: As thick plates, parallel to {010}, to 12 cm.
  
Color: Colorless to pale blue
Diaphaneity: Translucent
Luster: Vitreous, pearly on {010}
Hardness (Mohs): 1.5 - 2
Measured Density: 2.35 - 2.42 g/cm3
Cleavage: Perfect on {010}.
Tenacity: Flexible in thin flakes.
Streak: White to pale blue, darkening after several days
  
Geologic Setting: As fracture fillings in sideritic iron formation (Yukon Territory, Canada); as a folded ribbonlike mass in sediment from a raised beach (Marlborough Province, New Zealand).
Mineral Association: Siderite, vivianite, lazulite, whiteite, collinsite, childrenite, quartz (Yukon Territory, Canada).
  

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