The crystal structure of mammothite, Pb6Cu4AlSbO2(OH)16Cl4(SO4)2

  • H. Effenberger


The crystal structure of mammothite, Pb6Cu4AlSbO2(OH)16Cl4(SO4)2, was determined by single crystal X-ray investigations (a=18.93(3) Å,b=7.33(1) Å,c=11.35(2) Å, β=112.44(10)°, space groupC2/m, Z=2). The refinement yieldedR w =0.047 for 2465 reflections with sinθ/λ⩽0.80Å-1. Mammothite is one of the few minerals with the Sb atom in the pentavalent state. The crystal structure contains [AlO(h)6] and [SbO2O(h)4] octahedra as well as zigzag chains built up by [Cu(1)[4]O(h)4] and [Cu(2)[4+1]OO(h)4] polyhedra. The coordination of the two crystallographically different Pb atoms may be described as [Pb(1)O(h)4ClO(s)4] and [Pb(2)OO(h)3Cl2O(s)3]. The connection of the coordination polyhedra results in a three-demensional network structure.


Reflection Crystal Structure Geochemistry Network Structure Coordination Polyhedron 
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Die Kristallstruktur von Mammothit, Pb6Cu4AlSbO2(OH)16Cl4(SO4)2


Die Kristallstruktur von Mammothit, Pb6Cu4AlSbO2(OH)16Cl4(SO4)2, wurde mittels röntgenographischer Einkristalluntersuchungen bestimmt (a=18,93(3) Å,b=7,33(1) Å,c=11,35(2) Å, β=112,44(10)°, RaumgruppeC2/m, Z=2). Die Strukturverfeinerung ergab für 2465 Reflexe mit sinθ/λ⩽0,80Å-1R w =0,047. Mammothit ist eines der wenigen Minerale mit fünfwertigen Sb-Atomen. Die Kristallstruktur besteht aus [AlO(h)6]- und [SbO2O(h)4]-Oktaedern sowie aus zu zickzackförmigen Ketten verknüpften [Cu(1)[4]O(h)4] und [Cu(2)[4+1]OO(h)4]-Polyedern. Die Koordinationen der beiden kristallographisch verschiedenen Pb-Atome können als [Pb(1)O(h)4ClO(s)4] und [Pb(2)OO(h)3Cl2O(s)3] beschrieben werden. Durch die Verknüpfung der Koordinationspolyeder entsteht ein dreidimensionaler Gerüstverband.


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© Springer-Verlag 1985

Authors and Affiliations

  • H. Effenberger
    • 1
  1. 1.Institut für Mineralogie und Kristallographie der Universität WienWienAustria

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