Nontronite, Hollandite

Specimen ID: WMG-8AD

Nontronite : Na0.3Fe2((Si,Al)4O10)(OH)2·nH2O
Hollandite : Ba(Mn4+6Mn3+2)O16
As recorded:
Can Súria quarry, Maçanet de la Selva, La Selva, Girona, Catalonia, Spain
Mindat locality:

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A new species for Spanish mineralogy. Flattened, radial and scoriaceous growths of yellow calcian Nontronite that have completely replaced earlier Laumontite crystals. Calcian Nontronite is filling vacuoles of a volcanic rock.Pedrera Can Súria, Maçanet de la Selva, La Selva, Girona, Spain.Found in 05-06/2008Specimen size: 9.2 × 8.7 × 3.4 cm
Jordi Fabre - 26th September 2008
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