| Synthesis and Crystal Structure of Er_2Si_2O_7 |
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| 作者姓名： | CHI Li-Sheng CHEN Hua-Yang ZHUANG Hong-Hui HUANG Jin-Shun |
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| 作者单位： | State Key Laboratory of Structural Chemistry，Fujian institute of Research onthe Structure of Matter，the Chinese Academy Of Sciences，Fujian Fuzhou 350002 |
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| 摘 要： | 1INTRODUCTIONThecompoundwithcompositionIRE,O,:ZSiO,(RE~rareEarth)exhibitsex-tensivepolymorphismthatarecharacterizedbyboundariesateuropiumandholmiumalongtheseriesoftrivalentrareearths.Asfarasthestructureisconcerned,typeCisofspecialstabilitybecauseitsrangecanbeextendedbeyondthesmallestrareearthLug toScs tl'z}.Notlongago,wereportedstructureofNd,Si,O,withstructureformAt33.SynthesisandstructureofErZSiZO7withstructureformCarehereinre-ported.2EXPERIMENTAL'ThestartingmaterialsEr,O,…
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Synthesis and Crystal Structure of Er_2Si_2O_7 |
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| CHI Li-Sheng ,CHEN Hua-Yang, ZHUANG Hong-Hui, HUANG Jin-Shun.Synthesis and Crystal Structure of Er_2Si_2O_7[J].Chinese Journal of Structural Chemistry,1998(1). |
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| Authors: | CHI Li-Sheng CHEN Hua-Yang ZHUANG Hong-Hui HUANG Jin-Shun |
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| Abstract: | The title compound crystallizes in monoclinic system, space group C2/m with cell dimensions of a=6. 843(2), b=8. 939(2), c=4. 720(1) A, β=101. 77(2), V=282. 7A3, Z=2, Mr=502. 69, Dc=5' 91 g·cm-3, u(MoKa)=303. 0cm-1, F(000) ~ 440. The structure solution and refinement are based on 869 uniqueobserved reflections with I≥3(I) and the final discrepancy factors converged at R=0. 034, Rw= 0. 042. The structure is considered to be the oxygen atoms packed innearly hexagonal arrangement with rare earth atoms in the octahedral and silicon atomsin tetrahedral holes in alternately parallel layers. |
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| Keywords: | solid state synthesis crystal structure thortveitite |
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