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Hilgardite-4M

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A polytype of Hilgardite

Monoclinic polytype of Hilgardite.

Originally described from Choctaw Salt Dome, Iberville Parish, Louisiana, USA.

Classification of Hilgardite-4M

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Other Names for Hilgardite-4M

Other Languages:
Russian:Хилгардит-4M

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hilgardite-4M

Reference List:

- +
Ghose, S.(1985): A new nomenclature for the borate minerals in the hilgardite
(Ca2B5O9Cl*H2O)-tyretskite (Ca2B5O9OH * H2O) group. American Mineralogist. 70: 636-637.

Rachlin, A.L., Mandarino, J.A., Murowchick, B.L., Ramik, R.A., Dunn, P.J., and Back, M.E. (1986) Mineralogy of hilgardite-4M from evaporites in New Brunswick. Canadian Mineralogist. 24: 689-693.

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  • Localities for Hilgardite-4M

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • New Brunswick
      • Kings Co.
        • Cardwell Parish
          • Penobsquis
    Mandarino, J.A., Murowchick, B.L., Ramik, R.A., Dunn, P.J. and Back, M.E. (1986): Mineralogy of hilgardite-4M from evaporites in New Brunswick. Canadian Mineralogist. 24, 689–693.
    USA
     
    • Louisiana
      • Iberville Parish
        • Plaquemine
    Ghose, S. & Wan, C. (1979): Hilgardite, Ca2[B5O9]Cl*H2O: a piezoelectric zeolite-type pentaborate. American Mineralogist. 64, 187-195; Ghose, S.(1985): A new nomenclature for the borate minerals in the hilgardite (Ca2B5O9Cl*H2O)-tyretskite (Ca2B5O9OH * H2O) group. American Mineralogist. 70: 636-637.
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