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)

Environment:

Marine potash deposits; rarely in efflorescences.

IMA Status:

Valid Species (Pre-IMA) 1889

Locality:

Saxony-Anhalt, from Schmidtmannshall, near Aschersleben, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the potassium, KALIum, and BORate in the composition.

Name Pronunciation:

Kaliborite + Pronunciation

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),

Forms:

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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

Diaphaneity:

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
Ncalc = 1.48 - 1.51

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:

Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Kaliborite =2.12 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

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)
Concentration of Kaliborite per GRapi unit = 1.26 (%)

Estimated Radioactivity from Kaliborite - barely detectable

Kaliborite Classification

Dana Class:

26.05.13.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.13)Dana Group

26.05.13.01 Kaliborite KHMg2B12O16(OH)10•4(H2O) C 2/c 2/m

Strunz Class:

06.FB.10 06 - BORATES

06.F - Hexaborates

06.FB -Ino-hexaborates

06.FB.10 Kaliborite KHMg2B12O16(OH)10•4(H2O) C 2/c 2/m

Other Kaliborite 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 Kaliborite :
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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Ask about Kaliborite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Kaliborite Specimen Label here :

Kaliborite

KHMg2B12O16(OH)10•4(H2O)
Dana No: 26.05.13.01 Strunz No: 06.FB.10
Locality:

Notes: