ICCAS OpenIR
Mullite-type Ga4B2O9: structure and order disorder phenomenon
Cong, Rihong1; Yang, Tao1; Li, Kuo1; Li, Hongmei1; You, Liping2; Liao, Fuhui1; Wang, Yingxia1; Lin, Jianhua1
2010-04-01
Source PublicationACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
ISSN0108-7681
Volume66Pages:141-150
AbstractGa4B2O9, an aluminium-free mullite-type compound, was prepared by a boric-acid flux method and its structure was determined using powder X-ray diffraction techniques, in combination with transmission electron microscopy, solidstate B-11 MAS-NMR and IR spectroscopies. GaO6 octahedra share edges in a trans-manner forming one-dimensional chains along the b direction, and the chains are further cross-linked by GaO5, BO3 and BO4 groups into a three-dimensional mullite-type structure. The disorder of the inter-chain groups results in a small unit cell for Ga4B2O9 compared with that for Al4B2O9, an ordered compound with a superstructure. By deconstructing the structure of Ga4B2O9, we were able to identify the fundamental building units and their linking rules which can be used to reconstruct the ordered and disordered structures. For Ga4B2O9, we found that the structure is intrinsically disordered within the ac plane, but ordered along the b axis. The three-dimensional structure can then be constructed by stacking the disordered ac sheets along the b axis (1 2 b) with a 1 2 a shift. The fundamental building units and exclusivity rules identified in this gallium borate mullite may also be useful for understanding other related mullite phases. The structure analysis applying the proposed method is used to recognize the structural features of Al4B2O9 and Al18B4O33.
DOI10.1107/S0108768110000650
Indexed BySCI
Language英语
WOS IDWOS:000275648800004
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68752
Collection中国科学院化学研究所
Corresponding AuthorWang, Yingxia
Affiliation1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
2.Peking Univ, Electron Microscopy Lab, Sch Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Cong, Rihong,Yang, Tao,Li, Kuo,et al. Mullite-type Ga4B2O9: structure and order disorder phenomenon[J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE,2010,66:141-150.
APA Cong, Rihong.,Yang, Tao.,Li, Kuo.,Li, Hongmei.,You, Liping.,...&Lin, Jianhua.(2010).Mullite-type Ga4B2O9: structure and order disorder phenomenon.ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE,66,141-150.
MLA Cong, Rihong,et al."Mullite-type Ga4B2O9: structure and order disorder phenomenon".ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE 66(2010):141-150.
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