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Hamada, Shimane Prefecture, Chugoku region, Honshu Island, Japan

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Altered alkaline volcanics.





Mineral List:
  		•  Aegirine
    NaFe
    3+
     
    		[Si
     
    2
    		O
     
    6
    		]
    Reference: [Matsubara, S. (2003) Minerals in Japan (Field Best Encyclopedia series)]
  		•  Åkermanite
    Ca
     
    2
    		Mg[Si
     
    2
    		O
     
    7
    		]
    Reference: [The Mineral Species of Japan (5th ed) Matsubara]
  		•  Gismondine
    Ca[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]·4.5H
     
    2
    		O
    Reference: [Matsubara, S. (2003) Minerals in Japan (Field Best Encyclopedia series)]
  		•  Gonnardite
    Na
     
    2
    		Ca[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		]
     
    2
    		 · 7H
     
    2
    		O
    Reference: [Matsubara, S. (2003) Minerals in Japan (Field Best Encyclopedia series)]
  		•  Nepheline
    (Na,K)[AlSiO
     
    4
    		]
    Reference: [Masutomi Museum specimen, Kyoto]
  		•  Phillipsite-K
    (K,Na,Ca
     
    0.5
    		,Ba
     
    0.5
    		)
     
    4-7
    		[Al
     
    4-7
    		Si
     
    12-9
    		O
     
    32
    		]
    .
     
    		 12H
     
    2
    		O
    Reference: [Matsubara, S. et al (1998) Koubutsugaku Zasshi, 27, 195-202.]


    6 entries listed. 6 valid minerals.

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