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Formula:
Tectosilicate (framework silicate), paulingite subgroup,
zeolite group
Crystal system: Isometric
Specific gravity: 2.085 measured, 2.10 calculated
Hardness: 5
Streak: White
Colour: Colourless to pale yellow
Environments
Localities
At the type locality, Rock Island Dam, Douglas County, Washington, USA, paulingite-K has been found as
perfect clear rhombic dodecahedra, 0.1 to 1.0 mm across, in vesicular
basalt. Associated minerals include
calcite,
heulandite subgroup minerals,
phillipsite subgroup minerals and
pyrite
(Mindat).
Paulingite-K from Rock Island Dam -
Image
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