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A preliminary structure model for the new unit cell (orthorhombic, a=1.487nm; b=0.572nm; c(chainaxis)=1.258nm) of poly(p-hydroxybenzoic acid) whisker crystals was proposed on the basis of energy calculations, assuming the space group to be Pbca as the highest one. First, the torsion angle of phenyl ring and mutual shift of molecular stems along the chain direction were varied, and several models were...
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