Uranophane Group

boltwoodite

natroboltwoodite

parauranophane

uranophane

The uranophane group includes:

boltwoodite: (K,Na)(UO2)(SiO3OH).1.5H2O
parauranophane: Ca(UO2)2(SiO3OH)2.5H2O
uranophane: Ca(U6+O2)2(SiO3OH)2.5H2O

Group members are uranyl silicates with U:Si equal to 1:1

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