Chambersite Mineral Data + 
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- 25.6.1.1 Boracite Mg3B7O13Cl P ca21 mm2
- 25.6.1.2 Ericaite (Fe,Mg,Mn)3B7O13Cl P ca21 mm2
- 25.6.1.3 Chambersite Mn3B7O13Cl P ca21 mm2
- V/L.04-10 Boracite Mg3B7O13Cl P ca21 mm2
- V/L.04-20 Ericaite (Fe,Mg,Mn)3B7O13Cl P ca21 mm2
- V/L.04-30 Chambersite Mn3B7O13Cl P ca21 mm2
- V/L.04-35 Trembathite (Mg,Fe)3B7O13Cl R 3c 3m
- V/L.04-40 Congolite (Fe,Mg,Mn)3B7O13Cl R 3c 3m
General Chambersite Information |
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 Chemical Formula: |
Mn3B7O13Cl | ||
| Composition: |
Molecular Weight = 483.93 gm | ||
| Manganese 34.06 % Mn 43.98 % MnO | |||
| Boron 15.64 % B 50.35 % B2O3 | |||
| Chlorine 7.33 % Cl 7.33 % Cl | |||
| - % Cl -1.65 % -O=Cl2 | |||
| Oxygen 42.98 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mn2+3B7O13Cl | ||
| Environment: |
Insoluble borate obtained from mining rock salt in a shallow salt dome mine. | ||
| IMA Status: |
Approved IMA 1962 | ||
| Locality: |
Barber's Hill salt dome, Chambers County, Texas, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Synonym: |
ICSD 402906 | ||
| PDF 14-638 | |||
Chambersite Image | |||
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Images:
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Chambersite Crystallography |
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| Axial Ratios: |
a:b:c =1:1:1.4124 | ||
| Cell Dimensions: |
a = 8.68, b = 8.68, c = 12.26, Z = 4; V = 923.70 Den(Calc)= 3.48 | ||
| Crystal System: |
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P ca21 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.07(1), 2.08(0.6), 2.74(0.6), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Chambersite |
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| Cleavage: |
None | ||
| Color: |
Colorless, Purple red. | ||
| Density: |
3.49 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments. | ||
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. | ||
| Habit: |
Pseudo Tetragonal - Crystals show a tetragonal shape. | ||
| Hardness: |
7 - Quartz | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Chambersite |
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| Gladstone-Dale: |
CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.212,KPDmeas= 0.2114,KC= 0.218 |
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| Optical Data: |
Biaxial (+), a=1.732, b=1.737, g=1.744, bire=0.0120, 2V(Calc)=82, 2V(Meas)=83. | ||
Calculated Properties of Chambersite |
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| Electron Density: |
relectron=3.32 gm/cc |
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| Fermion Index |
Fermion Index = 0.03132 Boson Index = 0.96868 |
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| Photoelectric: |
PEChambersite = 9.46 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chambersite is Not Radioactive |
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Chambersite Classification |
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| Dana Class: |
25.6.1.3 (25)Anhydrous Borates Containing Hydroxyl or Halogen | ||
| (25.6)Dana Type | |||
| (25.6.1)Boracite Group (Orthorhombic: Rca21) | |||
| Strunz Class: |
V/L.04-30 V - Nitrates, Carbonates and Borates | ||
| V/L - Shelly borates with [BO2]1- to [B6O10]2- | |||
| V/L.04 - Boracite - Congolite series | |||
Other Chambersite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Chambersite : 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 -École des Mines de Paris Search for Chambersite using: Visit our Advertisers for Chambersite : Translate Chambersite Mineral Data : Ask about Chambersite here : Print or Cut-and-Paste your Chambersite Specimen Label here :
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