Chambersite (original) (raw)
A valid IMA mineral species
About ChambersiteHide
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Colour:
Colorless to deep purple
Crystal System:
Orthorhombic
Name:
From Chambers County, Texas, USA, where it was first discovered.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:966:3
e38173c7-a591-4a48-8618-9a4942666df4
IMA Classification of ChambersiteHide
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Type description reference:
Classification of ChambersiteHide
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6.GA.05
6 : BORATES
G : Heptaborates and other megaborates
A : Tekto-heptaborates
25.6.1.3
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
10.1.18
10 : Borates with other anions
1 : Borates with halide
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cbs | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of ChambersiteHide
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Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Sorry, your browser doesn't support HTML5 audio. | Jolyon Ralph | United Kingdom |
Physical Properties of ChambersiteHide
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Transparency:
Transparent, Opaque
Colour:
Colorless to deep purple
Comment:
Darkens with exposure to sunlight
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
3.49(2) g/cm3 (Measured) 3.48 g/cm3 (Calculated)
Optical Data of ChambersiteHide
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RI values:
_n_α = 1.732 _n_β = 1.737 _n_γ = 1.744
2V:
Measured: 83° , Calculated: 82°
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of ChambersiteHide
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Mindat Formula:
Mn2+3(B7O13)Cl
Crystallography of ChambersiteHide
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Crystal System:
Orthorhombic
Class (H-M):
m _m_2 - Pyramidal
Cell Parameters:
a = 8.68(1) Å, b = 8.68(1) Å, c = 12.26(1) Å
Ratio:
a:b:c = 1 : 1 : 1.412
Unit Cell V:
923.70 ų (Calculated from Unit Cell)
Morphology:
Pseudotetrahedral
Twinning:
Rare interpenetrant on [111] with twin plane of {111}
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011067 | Chambersite | Kubel F, Crottaz O (1996) Crystal structure of manganese chlorine boracite, Mn3B7O13Cl Zeitschrift fur Kristallographie 211 924-924 |  |
1996 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.07 Å | (100) |
| 2.74 Å | (60) |
| 2.08 Å | (60) |
| 3.54 Å | (50) |
| 2.17 Å | (50) |
| 1.851 Å | (50) |
| 2.50 Å | (30) |
Geological EnvironmentHide
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Type Occurrence of ChambersiteHide
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General Appearance of Type Material:
Subhedral to euhedral crystals ranging from less than 1 mm to 1.2 cm on an edge. The dominant form is the positive tetrahedron.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA, number 107884.
National Museum of Natural History, Washington, D.C., USA, number 115327.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Reference:
Honea, R.M., Beck, F.R. (1962) Chambersite, a new mineral. American Mineralogist: 47: 665-671.
Other Language Names for ChambersiteHide
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Relationship of Chambersite to other SpeciesHide
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Other Members of this group:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for ChambersiteHide
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References for ChambersiteHide
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Reference List:
Wang, Pengfei, Sun, Jianfeng, Tang, Qingguo, Yang, Shuang, Xu, Zishuai, Mu, Xiaozhan (2018) Effect of heat treatment on chambersite crystal structure and morphology. The Canadian Mineralogist, 56 (3) 223-233 doi:10.3749/canmin.1700072
Localities for ChambersiteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.