Aldzhanite Mineral Data

General Aldzhanite Information

Chemical Formula:

CaMgB2O4Cl•7(H2O) (?)

Composition:

Molecular Weight = 311.56 gm

Calcium 12.86 % Ca 18.00 % CaO

Magnesium 7.80 % Mg 12.94 % MgO

Boron 6.94 % B 22.35 % B₂O₃

Hydrogen 4.53 % H 40.48 % H₂O

Chlorine 11.38 % Cl 11.38 % Cl

- % Cl -2.57 % -O=Cl₂

Oxygen 56.49 % O

______ ______

100.00 % 102.57 % = TOTAL OXIDE

Empirical Formula:

CaMgB₂O₄Cl•7(H₂O)

Environment:

Found in the insoluble residues of carnallite-bischofite rock. A Cl and Mg rich Pentahydroborite. Poorly characterized material.

IMA Status:

Not Approved IMA 1972 - Published 1968

Locality:

Locality is not given, presumably in Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Not given in abstract.

Aldzhanite Crystallography

Axial Ratios:

a:b:c =0.8745:1:0.5613

Cell Dimensions:

a = 12.76, b = 14.59, c = 8.19, Z = 6; V = 1,524.72 Den(Calc)= 2.04

Crystal System:

Orthorhombic Space Group: Unk

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

By Intensity(I/I_o): 7.46(1), 3.07(0.9), 2.548(0.8),

Physical Properties of Aldzhanite

Color:

Colorless, Pale rose.

Density:

2.21

Diaphaneity:

Transparent

Hardness:

2-2.5 - Gypsum-Finger Nail

Optical Properties of Aldzhanite

Gladstone-Dale:

CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.299,KPDmeas= 0.276,KC= 0.2853
Ncalc = 1.58 - 1.63

Optical Data:

Biaxial (?), a=1.6, g=1.62, bire=0.0200

Calculated Properties of Aldzhanite

Electron Density:

Bulk Density (Electron Density)=2.28 gm/cc
note: Specific Gravity of Aldzhanite =2.21 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Aldzhanite= 2.60 barns/electron
U=PE_Aldzhanite x rElectron Density= 5.94 barns/cc.

Radioactivity:

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

Aldzhanite Classification

Dana Class:

13.00.00.00 (13)Carbonate Minerals

(13.00)Without Dana Classification Numbers

(13.00.00)Borate, Basic Hydrated Chloride

13.00.00.00 Aldzhanite* CaMgB2O4Cl•7(H2O)(?) Unk Ortho

13.00.00.00 Alfredstelznerite Ca4(H2O)4[B4O4(OH)6]4{H2O}15 P ca2₁ mm2

13.00.00.00 Balavinskite? Sr2B6O11•4(H2O) Mono ? Mono

13.00.00.00 IMA2008-069 Na3Y(CO3)3•6H2O P 6₃ 6

13.00.00.00 Mackelveyite-(Y) NaBa3CaY(CO3)3(OH)6•3H2O P1 1

Strunz Class:

06.BC.10 06 - BORATES

06.B - Diborates

06.BC -Ino-diborates with triangles and/or tetrahedra

06.BC.10 Aldzhanite* CaMgB2O4Cl•7(H2O)(?) Unk Ortho

06.BC.10 Calciborite CaB2O4 Pccn 2/m 2/m 2/m

Other Aldzhanite Information

References:

NAME( AmMin, v56:1222) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Aldzhanite :
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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Aldzhanite

CaMgB2O4Cl•7(H2O) (?)
Dana No: 13.00.00.00 Strunz No: 06.BC.10
Locality:

Notes:

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