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Mineralogy, crystallography and structural complexity of natural uranyl silicates

Naturally occurring uranyl silicates are common constituents of the oxidized parts of various types of uranium deposits. Their abundance reflects the widespread uranyl silicate minerals are known. The natural u...

Geology

  • 2018
  • Jimp
  • Link
Result

Thermal analysis of uranyl minerals III. Uranyl silicates

DB - Geologie a mineralogie

  • 1994
  • Jx
Result

Crystallization of uranyl silicate natroboltwoodite during an experimental dissolution of the mineral Yttrialite-(Y): crystal structure and Raman spectroscopy

the other known uranyl silicate structures in the size of its respective unit-cell and naturally occurring uranyl silicates is provided and discussed....

Mineralogy

  • 2022
  • Jimp
  • Link
Result

The (3+3) commensurately modulated structure of the uranyl silicate mineral swamboite-(Nd), Nd0.333[(UO2)(SiO3OH)](H2O)2.41

waves. The structure is based upon uranyl-silicate sheets of uranophane topologyThe uranyl mineral swamboite has been redefined to swamboite-(Nd) and its structure has been solved and refined as a commensurate structure in...

Geology

  • 2018
  • Jimp
  • Link
Result

Revision of the crystal structure and chemical formula of haiweeite, Ca(UO2)2(Si5O12)(OH)2?6H2O

A redetermination of the crystal structure of haiweeite was undertaken. The new singel-crystal X-ray diffraction experiment provided data based on which an improved structure model for this uranyl silicate mineral has been proposed....

DB - Geologie a mineralogie

  • 2013
  • Jx
  • Link
Result

Uranyl Minerals from Abandoned Podgórze Mine (Sudetes Mountains, SW Poland) and Their REE Content

compared to uranyl silicates, phosphates, and hydroxides, which have higher. Uranyl minerals from the Podgórze mine can be divided into three assemblages the mineralogical characteristics of uranyl minerals from t...

Mineralogy

  • 2022
  • Jimp
  • Link
Result

Crystallization of Uranyl Silicate Natroboltwoodite during an Experimental Dissolution of the Mineral Yttrialite-(Y): Crystal Structure and Raman Spectroscopy

the other known uranyl silicate structures in the size of its respective unit-cell and naturally occurring uranyl silicates is provided and discussed....

Geology

  • 2022
  • Jimp
  • Link
Result

The layered uranyl silicate mineral uranophane-β: crystal structure, mechanical properties, Raman spectrum and comparison with the α-polymorph

The crystal structure, elastic properties and the Raman spectrum of the layered calcium uranyl silicate pentahydrate mineral uranophane-ß, Ca(UO2)2Si2O6(OH)2•5H2O, are studied by means of first-principles solid-state methods and com...

Geology

  • 2019
  • Jimp
  • Link
Result

Cuprosklodowskite from the uranium deposit Zálesí near Javorník in the Rychlebské hory Mountains (Czech Republic)

The supergene copper uranyl silicate, cuprosklodowskite, was found at abandoned mine adits of the Zálesí uranium deposit, located near Javorník, the Rychlebské hory Mountains, Czech Republic. It forms light apple green earthy aggreg...

DB - Geologie a mineralogie

  • 2008
  • Jx
Result

Reinvestigation of the crystal structure of kasolite, Pb[(UO2)(SiO4)](H2O), an important alteration product of uraninite, UO2-x.

that is part of a nearly linear uranyl ion (UO2)2+, coordinated in the equatorial plane by fiveO ligands, forming pentagonal bipyramid. The uranyl pentagonal bipyramid s share edges to form chains parallel to [010]. The additional ...

DB - Geologie a mineralogie

  • 2013
  • Jx
  • Link
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