Chambersite

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Chambersite
2V angle
Measured: 83°
Dispersionr > v
Alters toColor darkens when exposed to sunlight
References[2][3][4]

Chambersite is a

Jixian, Tianjin, China.[8] Chambersite occurs associated with the evaporite minerals halite, anhydrite, and gypsum.[7]

Chemical and physical properties

When chambersite was first discovered in Barber's Hill, the dominant form was the positive tetrahedron, but single morphological twinned crystal was found with interpenetrating tetrahedrons with the twinning axis.[7] The ore discovered in China had formed in high grades that are spindle and granular that form micritic aggregates because the boron present is very pure and in low grades that had formed spheroids that are radially oriented.[8] When chambersite in China was compared it had the same chemical oxide ratio as the samples found in Barber's Hill.[8]

Oxide Chemical composition of chambersite in oxide percent[7]
B2O3 49.50
MnO 41.87
Cl 6.34
FeO 1.28
MgO 0.05
CaO trace
Total % 99.04

Geologic occurrence

Chambersite minerals were first found in 1957 in

magnetic activity and submarine volcanism in a subtidal lagoon.[8]

Special characteristics

Chambersite was named after the county where it was first discovered, Chambers County, Texas, US.[7] Optical examination and x-ray powder diffraction indicated the mineral to be related to boracite but different from any other published description.[7]

See also

References

  1. S2CID 235729616
    .
  2. ^ Mineralienatlas
  3. ^ Mindat.org
  4. ^ Handbook of Mineralogy
  5. ^ a b Grice et al., 2005
  6. ^ Yawn et al., 1997
  7. ^ a b c d e f g Honea et al., 1962
  8. ^ a b c d Fan et al., 1999
  9. ^ a b Smith et al., 1994
  • Anthony, J.W., Bidideaux, R., Bladh, K. and Nicholas, M. (2003) Chambersite Mn3B7O13Cl. Handbook of Mineralogy. Mineral data publishing
  • Fan, DL, Yang, PJ, and Wang, R (1999) Characteristics and origin of the Middle Proterozoic Dongshuichang chambersite deposit, Jixan, Tixian, Tianjin, China. Ore Geology Reviews, 15, 15-29.]
  • Grice, J. D., Gault, R. A., van Velthuizen, J. (2005) Borate minerals of the Penobsquis and Millstream deposit, southern New Brunswick, Canada. Canadian Mineralogist, 43, 1469-1488.]
  • Honea, Russell M., Beck, Frank R. (1962) Chamersite, a new mineral. American Mineralogist, 47, 665-671.
  • Smith, Arthur E., Jr. (1994) Louisiana mineral locality index. Rock and Mineral, 69, 156-162.]
  • Yawn, B., Simmons, W. B., Falster, A. U. (1997) Chemical Zonation in Chambersite and Boraciate from salt domes in the Gulf Coast region. Rock and Minerals, 72, 192.
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