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Ferrihollandite from
Stuor-Njåske (Stuor-Njuoskes), Ultevis, Jokkmokk, Norrbotten County, Sweden

Comments:Chemical analysis by A. Bygden of "hollandite" (sensu lacto) published in Ödman (1950) gave SiO2: 0.20; TiO2: 0.38; Al2O3: 0.63; Fe2O3: 12.52; MnO:54.49; BaO: 14,28; PbO: 4.32; Na2O: 0.05: K2O: O.22; H2O<105 degree: 0.09: H2O>105 degree: 1.35; O: 11.32; S:0.02; Insol in 20 % HCL: 0.19. Total 100.06
Habit:10-15 cm long columnar crystals
Validity:Believed Valid
References:Ödman, O.H. (1950): Manganese mineralization in the Ultevis district, Jokkmokk, North Sweden. Part 2: Mineralogical notes. Sveriges Geologiska Undersökning. Serie C 516. 1-27; Post, J.E., Von Dreele, R.B., Buseck, P.R. (1982): Symmetry and cation displacements in hollandites: structure refinements of hollandite, cryptomelane and priderite. Acta Crystallogr. B, 38,1056–1065.; Biagioni, C., Capalbo, C., Pasero, M. (2013): Nomenclature tunings in the hollandite supergroup. European Journal of Mineralogy 25, 85-90.
Mineral Data:Click here to view Ferrihollandite data
Locality Data:Click here to view Stuor-Njåske (Stuor-Njuoskes), Ultevis, Jokkmokk, Norrbotten County, Sweden
Nearest other occurrences of Ferrihollandite
6.1km (3.8 miles) Sörhårås, Ultevis, Jokkmokk, Norrbotten County, Sweden
16.4km (10.2 miles) Tjatisvare, Ultevis, Jokkmokk, Norrbotten County, Sweden
Mineral and/or Locality  
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