Aksaite Mineral Data

General Aksaite Information

Chemical Formula:

MgB6O7(OH)6•2(H2O)

Composition:

Molecular Weight = 339.24 gm

Magnesium 7.16 % Mg 11.88 % MgO

Boron 19.12 % B 61.57 % B₂O₃

Hydrogen 2.97 % H 26.55 % H₂O

Oxygen 70.74 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg(B₆O₇)(OH)₆•2(H₂O)

Environment:

In fine-grained halite in a salt dome.

IMA Status:

Approved IMA 1962

Locality:

Chelkar, Ak-Sai Valley, Uralsk district, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Aksaite

Synonym:

ICSD 15212

PDF 15-654

Aksaite Image

Images:

Aksaite

Comments: Gray-white massive aksaite fragment photographed through a capsule.
Location: Chelkar Salt dome, Ak-Say Valley, Kazakhstan. Scale: Not Given.
© Diederik Visser

Aksaite Crystallography

Axial Ratios:

a:b:c =0.5149:1:0.3073

Cell Dimensions:

a = 12.54, b = 24.35, c = 7.484, Z = 8; V = 2,285.23 Den(Calc)= 1.97

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca

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

By Intensity(I/I_o): 6.4(1), 4.72(0.5), 6.1(0.5),

Physical Properties of Aksaite

Cleavage:

{???} Good

Color:

Colorless, Gray, Light gray.

Density:

1.99

Diaphaneity:

Transparent

Hardness:

2.5 - Finger Nail

Streak:

white

Optical Properties of Aksaite

Gladstone-Dale:

CI meas= -0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.254,KPDmeas= 0.2514,KC= 0.2464
Ncalc = 1.49

Optical Data:

Biaxial (-), a=1.472, b=1.503, g=1.526, bire=0.0540, 2V(Calc)=78, 2V(Meas)=80.

Calculated Properties of Aksaite

Electron Density:

Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Aksaite =1.99 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Aksaite= 0.46 barns/electron
U=PE_Aksaite x rElectron Density= 0.93 barns/cc.

Radioactivity:

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

Aksaite Classification

Dana Class:

26.06.04.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.06)Dana Type

(26.06.04)Dana Group

26.06.04.01 Aksaite MgB6O7(OH)6•2(H2O) P bca 2/m 2/m 2/m

Strunz Class:

06.FA.05 06 - BORATES

06.F - Hexaborates

06.FA -Neso-hexaborates

06.FA.05 Aksaite MgB6O7(OH)6•2(H2O) P bca 2/m 2/m 2/m

Other Aksaite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Aksaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Aksaite

MgB6O7(OH)6•2(H2O)
Dana No: 26.06.04.01 Strunz No: 06.FA.05
Locality:

Notes:

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