Metal:Oxygen = 1:2 and similar with large (± medium-sized) cations; tunnel structures (Q161521)

From geokb
classification of minerals from the Strunz-Nickel classification system version 10
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Metal:Oxygen = 1:2 and similar with large (± medium-sized) cations; tunnel structures
classification of minerals from the Strunz-Nickel classification system version 10

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