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Hellandite-(Y)
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| Hellandite-(Y) Formula: (Al.55 Fe.45) Y2.622 Ca2.616 Si4 B4 H2 O24 Name: Hellandite-(Y) Unit cell: 18.99 4.715 10.3 90.0 111.4 90.0 , V=858.66 Space group: P12/A1 (13) |
Mellini M , Merlino S , American Mineralogist , 62 (1977) p.89-99, Hellandite: a new type of silicoborate chain
