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Bakhchisaraitsevite Mineral Data

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General Bakhchisaraitsevite Information

Help on Chemical  Formula: Chemical Formula: Na2Mg5(PO4)4•7(H2O)
Help on Composition: Composition: Molecular Weight = 673.50 gm
   Sodium       6.83 %  Na    9.20 % Na2O
   Magnesium   18.04 %  Mg   29.92 % MgO
   Phosphorus  18.40 %  P    42.15 % P2O5
   Hydrogen     2.10 %  H    18.72 % H2O
   Oxygen      54.64 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Mg5(PO4)4•7(H2O)
Help on Environment: Environment: In voids found in veins of vuggy dolomite carbonatite.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Carbonatite complex of the Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for crystallographer Alexander Yu. Bakhchisaraitsev (1947-1998).
Help on Synonym: Synonym: ICSD 89895

Bakhchisaraitsevite Image

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Comments: Yellow-brown, platy or thin tabular crystals of bakhchisaraitsevite from an Iron mine. Red arrow indicates the mineral.
Location: Kovdor massif, Kola peninsula, Russia. Scale: 5mm.
© Tom Loomis / Dakota Matrix

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Comments: Crystals of beige-colored bakhchisaraitsevite crystals in hydrothermal assemblage with colorless bobierrite on dolomite from a cavity in a deformed vein of dolomite carbonatite (CanMin, v 38, p 832).
Location: Kovdor Phosphorite-Carbonatite complex, Russia. Scale: See Image.
© Nataly A. Pekova

Bakhchisaraitsevite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6449:1:1.3565
Help on Cell Dimensions: Cell Dimensions: a = 8.32, b = 12.9, c = 17.5, Z = 4; beta = 102° V = 1,837.20 Den(Calc)= 2.43
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.56(1), 2.849(0.33), 10.31(0.33),3.02(0.28), 2.675(0.25), 3.314(0.23), 3.496(0.23),

Physical Properties of Bakhchisaraitsevite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless, Yellowish white, Greenish white.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Fan Shaped - Occurs as radiating crystals shaped like a fan.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Bakhchisaraitsevite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2224,KPDmeas= 0.2161,KC= 0.2181
Ncalc = 1.53 - 1.55
Help on Optical Data: Optical Data: Biaxial (+), a=1.538, b=1.54, g=1.543, bire=0.0050

Calculated Properties of Bakhchisaraitsevite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Bakhchisaraitsevite =2.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBakhchisaraitsevite = 1.43 barns/electron
U=PEBakhchisaraitsevite x rElectron Density= 3.60 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bakhchisaraitsevite is Not Radioactive

Bakhchisaraitsevite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.17)Dana Group Bakhchisaraitsevite! Na2Mg5(PO4)4•7(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.CH.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
08.CH.50 Bakhchisaraitsevite! Na2Mg5(PO4)4•7(H2O) P 21/c 2/m

Other Bakhchisaraitsevite Information

Help on References: References: NAME( AmMin, vol 86, p 767) PHYS. PROP.(AmMin, vol 86, p 767) OPTIC PROP.(AmMin, vol 86, p 767)
Help on See Also: See Also: Links to other databases for Bakhchisaraitsevite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.CH.50





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