issue contents
February 2016 issue
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Cover illustration: The structure of crocoite in the anion-centred description. The Charge Distribution (CHARDI) analysis shows that the structure can be described as centred on cation-centred homoligand polyhedra or anion-centred heteroligand polyhedra [see Nespolo (2016). Acta Cryst. B72, 51-66].
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Rietveld refinement of complementary synchrotron powder X-ray diffraction and neutron diffraction data leads to the resolution of the structure of the monoclinic phase of calcium pyrophosphate dihydrate (m-CPPD) including the determination of the precise position of the hydrogen atoms. These new structural data are of particular importance to further understand in vivo phenomena related to osteoarthritis: m-CPPD phase formation and evolution, and structure–inflammatory response relationships.
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