Inderborite Mineral Data

General Inderborite Information

Chemical Formula:

CaMg[B3O3(OH)5]2•6(H2O)

Composition:

Molecular Weight = 503.40 gm

Calcium 7.96 % Ca 11.14 % CaO

Magnesium 4.83 % Mg 8.01 % MgO

Boron 12.88 % B 41.49 % B₂O₃

Hydrogen 4.40 % H 39.37 % H₂O

Oxygen 69.92 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMgB₆O₆(OH)₁₀•6(H₂O)

Environment:

With other borates in the caprock of a salt diapir.

IMA Status:

Valid Species (Pre-IMA) 1941

Locality:

Inder borate deposit, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Inderborite + Pronunciation

Synonym:

ICSD 79155

PDF 47-1835

Inderborite Image

Images:

Inderborite

Comments: Translucent glassy crystalline inderborite.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Inderborite Crystallography

Axial Ratios:

a:b:c =2.5616:1:1.638

Cell Dimensions:

a = 19.11, b = 7.46, c = 12.22, Z = 4; beta = 90.8° V = 1,741.92 Den(Calc)= 1.92

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a

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

By Intensity(I/I_o): 3.35(1), 3.07(0.8), 3.26(0.8),

Physical Properties of Inderborite

Cleavage:

{100} Good

Color:

Colorless, White.

Density:

2.004

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Inderborite

Gladstone-Dale:

CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2646,KPDmeas= 0.2535,KC= 0.2624
Ncalc = 1.5 - 1.53

Optical Data:

Biaxial (-), a=1.482, b=1.512, g=1.53, bire=0.0480, 2V(Calc)=74, 2V(Meas)=77.

Calculated Properties of Inderborite

Electron Density:

Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Inderborite =1.92 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Inderborite= 1.33 barns/electron
U=PE_Inderborite x rElectron Density= 2.63 barns/cc.

Radioactivity:

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

Inderborite Classification

Dana Class:

26.03.01.02 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.03)Dana Type

(26.03.01)Inyoite Group

26.03.01.01 Inyoite Ca2B6O6(OH)10•8(H2O) P 2₁/a 2/m

26.03.01.02 Inderborite CaMg[B3O3(OH)5]2•6(H2O) A2/a 2/m

26.03.01.03 Inderite MgB3O3(OH)5•5(H2O) P 2₁/a 2/m

Strunz Class:

06.CA.25 06 - BORATES

06.C - Triborates

06.CA -Neso-triborates

06.CA.25 Inderborite CaMg[B3O3(OH)5]2•6(H2O) A2/a 2/m

Other Inderborite 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 Inderborite :
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 Inderborite Specimen Label here :

Inderborite

CaMg[B3O3(OH)5]2•6(H2O)
Dana No: 26.03.01.02 Strunz No: 06.CA.25
Locality:

Notes:

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