Inderborite Mineral Data

Inderborite Mineral Data +

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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)

IMA Status:

Valid Species (Pre-IMA) 1941

Locality:

Link to MinDat.org Location Data.

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 - PrismaticH-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),

Crystal Structure:

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Burns P C , Hawthorne F C , The Canadian Mineralogist , 32 (1994) p.533-539, Structure and hydrogen bonding in inderborite, a heteropolyhedral sheet, structure

Physical Properties of Inderborite

Cleavage:

[100] Good

Color:

Colorless, White.

Density:

2.004

Diaphaniety:

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

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:

r_electron=1.98 gm/cc
note: r_Inderborite=1.92 gm/cc.

Fermion Index

Fermion Index = 0.03091
Boson Index = 0.96909

Photoelectric:

PE_Inderborite= 1.33 barns/electron
U=PE_Inderborite x r_electron= 2.63 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Inderborite is Not Radioactive

Inderborite Classification

Dana Class:

26.3.1.2 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.3)Dana Type

(26.3.1)Dana Group

26.3.1.1 Inyoite Ca2B6O6(OH)10·8(H2O) P 2₁/a 2/m

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

26.3.1.3 Inderite MgB3O3(OH)5·5(H2O) P 2₁/a 2/m

Strunz Class:

V/H.06-30 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.06 - Kurnakovite - Solongoite series

V/H.06-10 Kurnakovite MgB3O3(OH)5·5(H2O) P1 1

V/H.06-20 Inderite MgB3O3(OH)5·5(H2O) P 2₁/a 2/m

V/H.06-30 Inderborite CaMg[B3O3(OH)5]2·6(H2O) A2/a 2/m

V/H.06-40 Meyerhofferite Ca2B6O6(OH)10·2(H2O) P1 1

V/H.06-50 Inyoite Ca2B6O6(OH)10·8(H2O) P 2₁/a 2/m

V/H.06-60 Solongoite Ca2B3O4(OH)4Cl P 2₁/c 2/m

Other Inderborite 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 Inderborite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Inderborite

CaMg[B3O3(OH)5]2·6(H2O)
Dana No: 26.3.1.2 Strunz No: V/H.06-30
Locality:

Notes: