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 % K2 O
Magnesium 6.78 % Mg 11.25 % MgO
Boron 18.10 % B 58.29 % B2 O3
Hydrogen 2.67 % H 23.88 % H2 O
Oxygen 66.98 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
KHMg2 B12 O16 (OH)10 •4(H2 O)
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 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 - Prismatic H-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io ): 6.215(1), 7.22(1), 3.104(0.7),
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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:
PEKaliborite = 0.96 barns/electronU=PEKaliborite 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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Kaliborite
KHMg2B12O16(OH)10•4(H2O)
Dana No: 26.05.13.01 Strunz No: 06.FB.10
Locality:
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