کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1330189 | 978944 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-pressure synthesis and crystal structure of silicon phosphate hydroxide, SiPO4(OH)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-pressure synthesis and crystal structure of silicon phosphate hydroxide, SiPO4(OH) High-pressure synthesis and crystal structure of silicon phosphate hydroxide, SiPO4(OH)](/preview/png/1330189.png)
چکیده انگلیسی
A new high-pressure phase, silicon phosphate hydroxide, was prepared at 8.3±0.5GPa and 1000 °C in >98% purity. From X-ray diffraction on a pseudo-merohedrally twinned crystal, it was found that SiPO4(OH) crystallizes in a monoclinic cell with space group P21/n (No. 14), a=6.8446(11)Ã
,b=6.8683(13)Ã
,c=6.8446(11)Ã
,β=119.77(1)â, and Z=4. The refinement gave a conventional Robs of 0.0320 and wRobs of 0.0864 for the overlapped data from both twin components. In the structure, SiO6 octahedra form chains along [101], with PO4 tetrahedra alternating along the chain in the b-direction. The parallel chains link up with tetrahedral corners from other chains to form a 3-dimensional network. SiPO4(OH) belongs to a structural family that includes HgSeO4·H2O. It is also related to the SbOPO4 structure by a small distortion that lowers the symmetry from C2/c in SbOPO4 to P21/c(P21/n) in SiPO4(OH).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 178, Issue 9, September 2005, Pages 2594-2601
Journal: Journal of Solid State Chemistry - Volume 178, Issue 9, September 2005, Pages 2594-2601
نویسندگان
Linda A. Stearns, Thomas L. Groy, Kurt Leinenweber,