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Hilgardite-4M
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| Hilgardite-4M.696 Formula: Ca2 Cl B5 O10 H2 Name: Hilgardite-4M Unit cell: 11.438 11.318 6.318 90.0 90.06 90.0 , V=817.90 Space group: Aa (9) |
Ghose S , Wan C , American Mineralogist , 64 (1979) p.187-195, Hilgardite, Ca2[B5O9]Cl*H2O: a piezoelectric zeolite-type pentaborate
