Karlite Mineral Data + 
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- 25.8.4.1 Karlite ! (Mg,Al)6(BO3)3(OH,Cl)4 P 212121 2 2 2
- V/G.05-10 Fluoborite Mg3(BO3)(F,OH)3 P 63/m 6/m
- V/G.05-20 Karlite (Mg,Al)6(BO3)3(OH,Cl)4 P 212121 2 2 2
- V/G.05-30 Jeremejevite Al6B5O15(F,OH)3 P 63/m 6/m
- V/G.05-40 Painite CaZrB[Al9O18] P 63/m 6/m
General Karlite Information |
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 Chemical Formula: |
(Mg,Al)6(BO3)3(OH,Cl)4 | ||
| Composition: |
Molecular Weight = 412.74 gm | ||
| Magnesium 26.50 % Mg 43.94 % MgO | |||
| Aluminum 9.81 % Al 18.53 % Al2O3 | |||
| Boron 7.86 % B 25.30 % B2O3 | |||
| Hydrogen 0.73 % H 6.55 % H2O | |||
| Chlorine 8.59 % Cl 8.59 % Cl | |||
| - % Cl -1.94 % -O=Cl2 | |||
| Oxygen 46.52 % O | |||
| ______ ______ | |||
| 100.00 % 100.97 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg4.5Al1.5(BO3)3(OH)3Cl | ||
| IMA Status: |
Approved IMA 1981 (Dana # Added) | ||
| Locality: |
Schlegeistal, Furtschaglhaus, Zillertal Alps, Austria Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for F. Karl, German professor at the University of Kiel, Austria. | ||
| Synonym: |
ICSD 29524 | ||
| PDF 36-381 | |||
Karlite Image | |||
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Images:
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Karlite Crystallography |
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| Axial Ratios: |
a:b:c =0.9816:1:0.1727 | ||
| Cell Dimensions: |
a = 17.637, b = 17.967, c = 3.104, Z = 4; V = 983.61 Den(Calc)= 2.79 | ||
| Crystal System: |
Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 212121 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.21(1), 2.83(0.92), 2.25(0.87), | ||
Physical Properties of Karlite |
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| Cleavage: |
[001] Perfect | ||
| Color: |
Light green, Silky white. | ||
| Density: |
2.8 - 2.85, Average = 2.82 | ||
| Diaphaniety: |
Transparent | ||
| Habit: |
Acicular - Occurs as needle-like crystals. | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Hardness: |
5.5 - Knife Blade | ||
| Luster: |
Silky | ||
| Streak: |
white | ||
Optical Properties of Karlite |
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| Gladstone-Dale: |
CI meas= 0.049 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2216,KPDmeas= 0.2189,KC= 0.23 |
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| Optical Data: |
Biaxial (-), a=1.589, b=1.632, g=1.634, bire=0.0450, 2V(Calc)=22, 2V(Meas)=24. | ||
Calculated Properties of Karlite |
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| Electron Density: |
relectron=2.76 gm/cc |
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| Fermion Index |
Fermion Index = 0.04235 Boson Index = 0.95765 |
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| Photoelectric: |
PEKarlite = 1.52 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Karlite is Not Radioactive |
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Karlite Classification |
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| Dana Class: |
25.8.4.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen | ||
| (25.8)Dana Type | |||
| (25.8.4)Dana Group | |||
| Strunz Class: |
V/G.05-20 V - Nitrates, Carbonates and Borates | ||
| V/G - "Insel" borates [BO3]3- "inseln" | |||
| V/G.05 - Fluoborite - Painite series | |||
Other Karlite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Karlite : 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 Search for Karlite using: Visit our Advertisers for Karlite : Translate Karlite Mineral Data : Ask about Karlite here : Print or Cut-and-Paste your Karlite Specimen Label here :
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