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The crystal structure of vauquelinite and the relationships to fornacite
Published/Copyright:
July 28, 2010
Abstract
Vauquelinite, Pb2Cu[CrO4PO4OH], is monoclinic, with a = 13.754, b = 5.806, c = 9.563 Å, β = 94°34′, space group P21/n. The crystal analysis of the mineral was determined by the trial-and-error method starting from the atomic positions found in fornacite. The refinement carried out by the least-squares method gave a final discrepancy index R of 0.089.
The atomic packing in vauquelinite is very similar to that in fornacite. Some differences occur in coordination around lead ions and in the arrangement of symmetry elements in the two minerals.
Published Online: 2010-07-28
Published in Print: 1968-08
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Articles in the same Issue
- Inclined dislocations in apophyllite crystals
- Oriented transformation of lithiophorite
- Refraktionsmodifizierte Braggsche Beugung bei asymmetrischer Durchstrahl-Reflexion
- Notes on the size of transition-metal atoms
- Crystal structure of cadmium mercuric thiocyanate, CdHg(SCN)4
- Product of the normalized intensities in a test for isomorphism using higher moments of intensities*
- The unit cell of gaylussite
- The crystal structures and infra-red spectra of barium and strontium nitrates
- A comparison of some weighted Fourier syntheses with the summation method for vector convergence
- A modification to Patterson syntheses
- Verfeinerung der Struktur des Zinkhydroxidchlorids II, Zn5(OH)8Cl2 · 1H2O
- The Z expansion of the atomic scattering factor for the helium sequence*
- The crystal structure of vauquelinite and the relationships to fornacite
- The study of polytypism in silicon carbide by x-ray diffraction topography
- The neutron-scattering amplitude of potassium
- Errata: Refinement of the structure of scandium sesquioxide
