Original paper

The crystal structure of Cu2Pb6Bi8S19

Topa, Dan; Makovicky, Emil; Balić-Žunić, Tonči; Berlepsch, Peter

European Journal of Mineralogy Volume 12 Number 4 (2000), p. 825 - 833

12 references

published: Jul 17, 2000
manuscript accepted: Mar 9, 2000
manuscript received: Sep 27, 1999

DOI: 10.1127/ejm/12/4/0825

BibTeX file

ArtNo. ESP147051204010, Price: 29.00 €

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Abstract The crystal structure of natural Cu2Pb6Bi8S19, space group C2/m, a = 27.64 Å, b = 4.05 Å, c = 20.74 Å, β= 131.26°, has been determined and refined to the value of R = 0.05 from 1488 reflections with I> 2 σI obtained on four-circle diffractometer equipped with a CCD area detector. It is composed of en echelon staggered fragments of (100)PbS sulfide layers which are two atomic layers thick and alternate with periodically sheared (111)Pbs layers; these are two octahedra thick. It is built from Pb coordination octahedra and bicapped trigonal prisms combined with Bi in square pyramidal/asymmetric octahedral coordinations. Cu occurs in paired tetrahedra interconnecting the staggered (100)Pbs fragments. Cu2Pb6Bi8S19 forms a homologous series with Cu2Pb3Bi8(S, Se)16 Gunoite) in which the sheared (111)Pbs layers are one octahedron thick. CU2Pb6Bi8S19 is a new sulfosalt from Felbertal, Austria


CU2Pb6Bi8S19crystal structurehomologous seriesjunoitesulfosalt