Found in Zone 4 (forsterite-diopside) of the contact aureole around the Kaizuki-yama granite. Renamed in 1998 from sodiumphlogopite by the IMA Mica commission. 1M polytype.
IMA Status:
Approved IMA 1980
Locality:
Found in waste rock in the Kawai pit of the Kasuga mine. Kasuga-mura, Gifu Prefecture, central Japan. Link to MinDat.org Location Data.
Name Origin:
The name is from the Greek "aspisidos", like a shield, alluding to the appearance of its crystals.
Name Pronunciation:
Aspidolite + Pronunciation
Synonym:
IMA2004-049
Natriumphlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)
Phlogopite-Na - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)
Sodium phlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)