Mineral Information and Data:

Bario-olgite
Na(Na,Sr,Ce)2Ba(PO4)2 [CNMNC approved formula]

Named for the composition and relationship to olgite.

IMA status : Approved Species 2004 (IMA2003-002)
CLASSIFICATION 
Dana
(8th edition) :
38.01.03.02  (This Dana# Added)
  (38) Anhydrous Phosphates, etc
  (38.01) A+ B++ XO4
  (38.01.03)
  
Nickel-Strunz
(10th edition) :
08.AC.40
  (08) Phosphates, Arsenates, Vanadates
  (08.A) Phosphates, etc. without additional anions, without H2O
  (08.AC) With medium-sized and large cations
  
Crystal system: Trigonal System
Point group (H-M): 3 — pyramidal
Space group: P3
Unit cell: a = 5.549Å, c = 7.032Å
Crystal Habit: Grains up to 1.5 x 1 cm; rarely as pyramidal prismatic crystals.
  
Color: Light green
Diaphaneity: Transparent
Luster: Vitreous
Hardness (Mohs): 4 - 4.5
Measured Density: 4.0 g/cm3
Tenacity: Brittle
Streak: White
  
Geologic Setting: In the hyperagpaitic ”Palitra” pegmatite.
Mineral Association: Manaksite, natrosilite, villiaumite, aegirine, ussingite, sodalite, serandite, chkalovite, vuonnemite
  

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