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Si modified Ge10 cluster: the preparation and characterization of single crystal Na4(Ge,Si)9O20

✍ Scribed by Peng-Yan Xiao; Tie-Zhen Ren; Zhi-Qiang Wang; K. E. Christensen

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 183 KB
Volume: 45
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.200900746

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✦ Synopsis

Ge 10 cluster, Na 4 (Ge,Si) 9 O 20 , hydrothermal.

A Si modified Ge 10 cluster with structure Na 4 (Ge,Si) 9 O 20 (denoted as HUT-1) was synthesized by hydrothermal synthesis at 160 °C with a sodium silicate source. The compound was characterized by single crystal, powder X-ray diffraction and TGA-DSC analysis. HUT-1 crystallizes in space group I4 1 (80) with calculated unit cell (a=14.966(5) Å, c=7.343(2) Å, V=1644.8(9) Å 3 ), which has the same structure as Na 4 Ge 9 O 20 . HUT-1 has a high Si/Ge ratio with an approximate formula of Na 4 Ge 7.68 Si 1.32 O 20 . Single crystal X-ray structure refinements together with results from X-ray powder diffraction (XRPD) confirm the occupancy of Si at two tetrahedral sites.

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