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Journal of Algebraic Combinatorics - By viewing $$\tilde{A}$$ and $$\tilde{D}$$ type cluster algebras as triangulated surfaces, we find all cluster variables in terms of either (i) the frieze... 相似文献
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Flacau R Ratcliffe CI Desgreniers S Yao Y Klug DD Pallister P Moudrakovski IL Ripmeester JA 《Chemical communications (Cambridge, England)》2010,46(48):9164-9166
Synchrotron powder X-ray diffraction, ab initio molecular dynamics calculations and solid state (1)H and (2)H NMR are used to refine the structure of crystalline NH(4)BH(4) including H atoms. Rapid reorientations of both ions mean that on average half-hydrogens occupy the corners of a cube around B or N. 相似文献
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