Research output: Contribution to journal › Article › peer-review
Crystals of the compound Na4(UO2)(CO3)3 have been synthesized and the structure has been solved. It is trigonal with a = 9.3417(6), c = 12.824(1) Å, V = 969.2(1) Å3, space group P3̄cl and Z = 4. The structure was refined on the basis of F2 (wR2 = 4.2%) for all unique data collected using Mo-Kα X-radiation and a CCD-based detector. The final R1 was 2.0%, calculated for 534 unique observed (Fo ≥ 4σF) reflections, and the goodness-of-fit (S) was 0.91. The structure contains a uranyl tricarbonate cluster composed of a uranyl hexagonal bipyramid that shares three equatorial edges with CO3 triangles. The uranyl tricarbonate clusters are connected through NaO6 and NaO5 polyhedra, forming a heteropolyhedral framework structure. This compound may be related to a uranyl carbonate phase with the same composition which has been reported as an alteration phase on the surface of Chernobyl 'lava', and as a mineral in the Jachymov ore district, Czech Republic.
Original language | English |
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Pages (from-to) | 297-304 |
Number of pages | 8 |
Journal | Mineralogical Magazine |
Volume | 65 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2001 |
ID: 88650205