Sakhaite Mineral Data

General Sakhaite Information

Chemical Formula:

Ca3Mg(BO3)2(CO3)•0.36(H2O)

Composition:

Molecular Weight = 328.65 gm

Calcium 36.58 % Ca 51.19 % CaO

Magnesium 7.40 % Mg 12.26 % MgO

Boron 6.58 % B 21.18 % B₂O₃

Hydrogen 0.22 % H 1.97 % H₂O

Carbon 3.65 % C 13.39 % CO₂

Oxygen 45.57 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃Mg(BO₃)₂(CO₃)•0.36(H₂O)

Environment:

In a skarn.

IMA Status:

Approved IMA 1966

Locality:

Solongo, Transbaikalia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality, Sakha being the name for Siberia in the Yakut language.

Name Pronunciation:

Sakhaite

Synonym:

ICSD 20203

PDF 19-1112

Sakhaite Image

Images:

Sakhaite

Comments: Dark gray octahedron of sakhaite embedded in gray calcite.
Location: Titovskoe, Sakha (Yakutia) Republic, Russia. Scale: See Image.
© Rruff Database

Sakhaite Crystallography

Cell Dimensions:

a = 14.685, Z = 16; V = 3,166.81 Den(Calc)= 2.76

Crystal System:

Isometric - Gyroidal H-M Symbol (4 3 2) Space Group: F 4₁32

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

By Intensity(I/I_o): 2.58(1), 2.108(0.56), 5.16(0.22),

Physical Properties of Sakhaite

Cleavage:

None

Color:

Colorless, Gray, Gray white.

Density:

2.78 - 2.83, Average = 2.8

Diaphaneity:

Transparent to Translucent

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5 - Apatite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Sakhaite

Gladstone-Dale:

CI meas= -0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.233,KPDmeas= 0.2292,KC= 0.2125
Ncalc = 1.59 - 1.6

Optical Data:

Isotropic, n=1.638-1.648.

Calculated Properties of Sakhaite

Electron Density:

Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Sakhaite =2.81 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Sakhaite= 4.78 barns/electron
U=PE_Sakhaite x rElectron Density= 13.35 barns/cc.

Radioactivity:

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

Sakhaite Classification

Dana Class:

27.01.04.01 (27)Compound Borates

(27.01)Dana Type

(27.01.04)Dana Group

27.01.04.01 Sakhaite Ca3Mg(BO3)2(CO3)•0.36(H2O) F 4₁32 4 3 2

Strunz Class:

06.AB.65 06 - BORATES

06.A - Monoborates

06.AB -BO3, with additional anions; 1(D) + OH, etc.

06.AB.65 Sakhaite Ca3Mg(BO3)2(CO3)•0.36(H2O) F 4₁32 4 3 2

Other Sakhaite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Sakhaite :
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 Sakhaite Specimen Label here :

Sakhaite

Ca3Mg(BO3)2(CO3)•0.36(H2O)
Dana No: 27.01.04.01 Strunz No: 06.AB.65
Locality:

Notes:

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