Bakhchisaraitsevite Mineral Data

[Newest Minerals] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa, PayPal, and Mastercard are Welcomed

General Bakhchisaraitsevite Information

Chemical Formula:

Na2Mg5(PO4)4•7(H2O)

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

Empirical Formula:

Na₂Mg₅(PO₄)₄•7(H₂O)

Environment:

In voids found in veins of vuggy dolomite carbonatite.

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Carbonatite complex of the Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for crystallographer Alexander Yu. Bakhchisaraitsev (1947-1998).

Synonym:

ICSD 89895

IMA1999-005

Bakhchisaraitsevite Image

Images:

Bakhchisaraitsevite

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

Images:

Bakhchisaraitsevite

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

Axial Ratios:

a:b:c =0.6449:1:1.3565

Cell Dimensions:

a = 8.32, b = 12.9, c = 17.5, Z = 4; beta = 102° V = 1,837.20 Den(Calc)= 2.43

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Yakubovich O V , Massa W , Liferovich R P , Pakhomovsky Y A , The Canadian Mineralogist , 38 (2000) p.831-838, The crystal structure of bakhchisaraitsevite,, [Na2(H2O)2]{(Mg4.5Fe0.5)(PO4)4(H2O)5}, a new mineral species of, hydrothermal origin from the Kovdor phoscorite - carbonatite complex, Russia, Locality: Kovdor phoscorite - carbonatite complex, Russia

Physical Properties of Bakhchisaraitsevite

Cleavage:

{001} Perfect

Color:

Colorless, Yellowish white, Greenish white.

Density:

2.5

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Fan Shaped - Occurs as radiating crystals shaped like a fan.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bakhchisaraitsevite

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

Optical Data:

Biaxial (+), a=1.538, b=1.54, g=1.543, bire=0.0050

Calculated Properties of Bakhchisaraitsevite

Electron Density:

Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Bakhchisaraitsevite =2.50 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Bakhchisaraitsevite}= 1.43 barns/electron
U=PE_{Bakhchisaraitsevite} x rElectron Density= 3.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bakhchisaraitsevite is Not Radioactive

Bakhchisaraitsevite Classification

Dana Class:

40.05.17.01 (40)Hydrated Phosphates, etc

(40.05)with miscellaneous formulae

(40.05.17)Dana Group

40.05.17.01 Bakhchisaraitsevite! Na2Mg5(PO4)4•7(H2O) P 2₁/c 2/m

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

References:

NAME( AmMin, vol 86, p 767) PHYS. PROP.(AmMin, vol 86, p 767) OPTIC PROP.(AmMin, vol 86, p 767)

See Also:

Links to other databases for Bakhchisaraitsevite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Bakhchisaraitsevite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bakhchisaraitsevite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Bakhchisaraitsevite Mineral Data :

Ask about Bakhchisaraitsevite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Bakhchisaraitsevite Specimen Label here :

Bakhchisaraitsevite

Na2Mg5(PO4)4•7(H2O)
Dana No: 40.05.17.01 Strunz No: 08.CH.50
Locality:

Notes: