Hodgesmithite crystal structure

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Marco E. Ciriotti
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Hodgesmithite crystal structure

Messaggio da Marco E. Ciriotti » gio 03 ott, 2019 10:15

Prossima pubblicazione.

Referenza:
▪ Elliott, P. (2019): Hodgesmithite, (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, a new copper zinc sulfate mineral with a unique decorated, interrupted-sheet structure. Acta Crystallographica, B75, (in press).

Abstract:
The crystal structure of the new mineral hodgesmithite has been solved using synchrotron radiation. The structure contains a unique, decorated, interrupted sheet capped by ZnO4 and SO4 tetrahedra.

NdR: Rammento che il ritrovamento italiano è su Micro, 11, 2-9 (2013).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 27091
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Hodgesmithite crystal structure

Messaggio da Marco E. Ciriotti » mar 03 dic, 2019 15:12

Pubblicazione effettuata.

Referenza:
▪ Elliott, P. (2019): Hodgesmithite, (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, a new copper zinc sulfate mineral with a unique decorated, interrupted-sheet structure. Acta Crystallographica, B75, 1069-1075.

Abstract:
Hodgesmithite, ideally (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, is a new copper zinc sulfate mineral from the Block 14 Opencut, Broken Hill, New South Wales, Australia. Electron microprobe analysis provided the empirical formula Cu4.84,Zn2.16,Cd0.04[(SO4)1.89,(SiO4)0.12]2.01(OH)9.82·3.15H2O based on 21 oxygen atoms per formula unit. Hodgesmithite is trigonal, space group P3, with a = 8.1905 (12), c = 7.0990 (14) Å, V = 412.43 (12) Å3 and Z = 1. The crystal structure of hodgesmithite, R1 = 0.0272 for 5145 reflections with Fo > 4σ(Fo) measured with synchrotron X‐ray radiation (λ = 0.71080 Å), contains interrupted sheets of edge‐sharing Cu(O,OH)6 octahedra in the (001) plane. Every seventh octahedral site is vacant and capped by a ZnO4 tetrahedron and an SO4 tetrahedron which are attached to the sheet above and below this position. The sheets are additionally decorated on one side by SO4 tetrahedra that share a vertex incident to three Cu—O(apical) bonds. Interstitial H2O groups lie between the sheets. ZnO4 tetrahedra share vertices with SO4 tetrahedra from the adjacent sheet to provide linkage between the sheets in the c direction.
Marco E. Ciriotti

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