Aldzhanite Mineral Data

Aldzhanite Mineral Data

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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 22.34 % 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:

A Cl and Mg rich Pentahydroborite. Poorly characterized material.

IMA Status:

Discredited IMA 1980

Locality:

Russia. Link to MinDat.org Location Data.

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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:

OrthorhombicSpace 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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Aldzhanite

Electron Density:

r_electron=2.28 gm/cc
note: r_Aldzhanite=2.21 gm/cc.

Fermion Index

Fermion Index = 0.02206
Boson Index = 0.97794

Photoelectric:

PE_Aldzhanite= 2.60 barns/electron
U=PE_Aldzhanite x r_electron= 5.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Aldzhanite is Not Radioactive

Aldzhanite Classification

Dana Class:

13.0.0.0 (13)Carbonate Minerals

(13.0)Without Dana Classification Numbers

(Borate, Basic Hydrated Chloride)

Strunz Class:

V/J.02-30 V - Nitrates, Carbonates and Borates

V/J - Chain borates with [B2O4]2- to [B6O10]2-

V/J.02 - Calciborite - Aldzhanite(?) series

V/J.02-10 Calciborite CaB2O4 Pccn 2/m 2/m 2/m

V/J.02-20 Chelkarite CaMgB2O4Cl2·7(H2O)(?) P bca 2/m 2/m 2/m

V/J.02-30 Aldzhanite CaMgB2O4Cl·7(H2O)(?) Unk Ortho

Other Aldzhanite Information

References:

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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Aldzhanite

CaMgB2O4Cl·7(H2O) (?)
Dana No: Unknown Strunz No: V/J.02-30
Locality:

Notes: