Definition of phillipsite
: a white or reddish mineral approximately (K2,Na2,Ca)Al2Si4O12.41⁄2 H2O consisting of a hydrous silicate of potassium, calcium, and aluminum, belonging to the zeolite family, and commonly occurring in complex often cruciform crystals (hardness 4–4.5, specific gravity 2.2)
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Origin and Etymology of phillipsite
William Phillips †1828 English mineralogist and geologist + English -ite
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