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MINERALOGY

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Mineral: HEULANDITE-Sr
Formula: (Sr0,5,Ca0,5,Na,K)9[Al9Si27O72].24H2O
Crystal System: Monoclinic
Group: Zeolite group. Heulandite series
IMA Number: 1997 s.p.
References: AM 53 (1968), 1120; HB2/1 (1995); EJM 10 (1998), 1037; L 11(1999), 8
Type Locality: Campegli mine, Liguria, Italy

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