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RESEARCH PRODUCT
Structure of the new mineral sarrabusite, Pb5CuCl4(SeO3)4, solved by manual electron-diffraction tomography.
Francesco DemartinCarlo Maria GramaccioliMauro GemmiMauro GemmiItalo CampostriniTatiana Goreliksubject
CrystallographyPolyhedronElectron diffractionZigzagChemistryCathode rayPrecessionPrecession electron diffractionGeneral MedicineCrystal structureGeneral Biochemistry Genetics and Molecular BiologyMonoclinic crystal systemdescription
The new mineral sarrabusite Pb5CuCl4(SeO3)4 has been discovered in the Sardinian mine of Baccu Locci, near Villaputzu. It occurs as small lemon–yellow spherical aggregates of tabular crystals (< 10 µm) of less than 100 µm in diameter. The crystal structure has been solved from and refined against electron diffraction of a microcrystal. Data sets have been measured by both a manual and an automated version of the new electron-diffraction tomography technique combined with the precession of the electron beam. The sarrabusite structure is monoclinic and consists of (010) layers of straight chains formed by alternating edge-sharing CuO4Cl2 and PbO8 polyhedra parallel to the c axis, which share corners laterally with two zigzag corner-sharing chains of PbO6Cl2 and PbO4Cl4 bicapped trigonal prisms. These blocks are linked together by SeO_3^{2-} flat-pyramidal groups.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-06 | Acta crystallographica. Section B, Structural science |