Mineral Information and Data:

Batisivite
BaTi6V8Si2O29 [CNMNC approved formula]

Named for its major cations (Ba, Ti, Si, and V).

IMA status : Approved Species 2006 (IMA2006-054)
CLASSIFICATION 
Dana
(8th edition) :
55.04.05.01  (This Dana# Added)
  (55) Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.04) with cations in [8] and lower coordination
  (55.04.05)
  
Nickel-Strunz
(10th edition) :
09.BE.95
  (09) Silicates
  (09.B) Sorosilicates (dimer) structures
  (09.BE) Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
Unit cell: a = 7.521Å, b = 7.643Å, c = 9.572Å; α = 110.20°, β = 103.34°, γ = 98.28°
Crystal Habit: Occurs as isometric and elongate anhedral grains up to 200 μm
  
Color: Black
Luster: Resinous
Hardness (Mohs): 7 - 7.5
Measured Density: 4.624 (calculated) g/cm3
Tenacity: Brittle
Fracture: Conchoidal
Streak: Black
  
Geologic Setting: Occurs as an accessory mineral in a Cr-V-rich,
quartz-diopside rock (Slyudyanka Complex, southern Baikal region, Russia).
Mineral Association: Cr-V-bearing diopside and tremolite, calcite, schreyerite, berdesinskiite, V-bearing titanite, ankangite, chromite-coulsonite series spinels, Fe-bearing oxides of the eskolaite-karelianite series, uraninite, chernykhite-roscoelite series micas, Cr-bearing goldmanite, dravite-vanadiumdravite tourmalines, albite, barite, zircon, and a suite of unnamed, U-Ti-V-Cr oxide phases (Slyudyanka Complex, southern Baikal region, Russia)
  

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