Kaliborite Mineral Data

Kaliborite Mineral Data +

General Kaliborite Information

Chemical Formula:

KHMg2B12O16(OH)10·4(H2O)

Composition:

Molecular Weight = 716.56 gm

Potassium 5.46 % K 6.57 % K₂O

Magnesium 6.78 % Mg 11.25 % MgO

Boron 18.10 % B 58.29 % B₂O₃

Hydrogen 2.67 % H 23.88 % H₂O

Oxygen 66.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KHMg₂B₁₂O₁₆(OH)₁₀·4(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1889

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 76660

PDF 18-669

Kaliborite Image

Images:

Kaliborite

Comments: Translucent colorless crystal of kaliborite.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kaliborite Crystallography

Axial Ratios:

a:b:c =2.196:1:1.7366

Cell Dimensions:

a = 18.93, b = 8.62, c = 14.97, Z = 4; beta = 99.9° V = 2,406.38 Den(Calc)= 1.98

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 6.215(1), 7.22(1), 3.104(0.7),

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Forms: [ 1 1 2] [ 1 1 0] [ 1 1 1] [ 1 0 0] [ 1 0 1]

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Crystal Structure:

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Burns P C , Hawthorne F C , The Canadian Mineralogist , 32 (1994) p.885-894, Kaliborite: An example of a crystallographically symmetrical, hydrogen bond

Physical Properties of Kaliborite

Cleavage:

[001] Perfect, [101] Perfect, [100] Good

Color:

Colorless, Gray white, White, Reddish brown.

Density:

2.116

Diaphaniety:

Transparent

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kaliborite

Gladstone-Dale:

CI meas= -0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.102 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2666,KPDmeas= 0.2495,KC= 0.2419

Optical Data:

Biaxial (+), a=1.5081, b=1.5255, g=1.55, bire=0.0419, 2V(Calc)=82, 2V(Meas)=80.633.

Calculated Properties of Kaliborite

Electron Density:

r_electron=2.14 gm/cc
note: r_Kaliborite=2.12 gm/cc.

Fermion Index

Fermion Index = 0.04314
Boson Index = 0.95686

Photoelectric:

PE_Kaliborite= 0.96 barns/electron
U=PE_Kaliborite x r_electron= 2.06 barns/cc.

Radioactivity:

GRapi = 79.53 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kaliborite - barely detectable

Kaliborite Classification

Dana Class:

26.5.13.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.5)Dana Type

(26.5.13)Dana Group

26.5.13.1 Kaliborite KHMg2B12O16(OH)10·4(H2O) C 2/c 2/m

Strunz Class:

V/J.05-40 V - Nitrates, Carbonates and Borates

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

V/J.05 - Larderellite - Kaliborite series

V/J.05-10 Larderellite (NH4)B5O6(OH)4 P 2₁/a 2/m

V/J.05-20 Ezcurrite Na4B10O17·7(H2O) P1 1

V/J.05-30 Probertite NaCaB5O7(OH)4·3(H2O) P 2₁/a 2/m

V/J.05-40 Kaliborite KHMg2B12O16(OH)10·4(H2O) C 2/c 2/m

Other Kaliborite 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 Kaliborite :
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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Print or Cut-and-Paste your Kaliborite Specimen Label here :

Kaliborite

KHMg2B12O16(OH)10·4(H2O)
Dana No: 26.5.13.1 Strunz No: V/J.05-40
Locality:

Notes: