Boltwoodite

Image

Boltwoodite on calcite, from Goanikontes Claim, Arandis, Swakopmund District, Erongo Region, Namibia

© Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

Properties

Formulas (H3O)(Na,K)(UO2)SiO4·(H2O), (K,Na)(UO2)(SiO3OH)·1.5H2O
Abbreviation Bwd
Variant Na
Classification Uranophane (group)
Luminescence emitter UO2
IMA Status Grandfathered (pre-IMA), 1956
Search other databases webmineral.com, mindat.org, rruf.info, fluomin.org, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Related materials Natroboltwoodite
Crystal symmetry Monoclinic, Point group 2/m, Space group P21/m (#11)
Tags Hydroxide , Mineral, Silicate , Uranyl, Uranyl , Hydrated

Composition

Element Atoms
U 1
H 4
Si 1
Na ~0.5
K ~0.5
O 7.5

Reference

Reference Lines Spectra Images
Gorobets and Rogojine 2002 5 0 0