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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Crystal structure of ammonium catena-polyphosphate IVNH4PO3(x)
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Crystal structure of ammonium catena-polyphosphate IVNH4PO3(x)

机译:儿茶酸多磷酸铵IV的晶体结构NH4PO3(x)

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Phase-pure ammonium catena-polyphosphate IV NH4PO3(x) was synthesized by heating NH4H2PO4 in a tube furnace under an ammonia gas flow. The product contained single crystals of NH4PO3(x) IV appropriate for an X-ray structure determination enabling structure refinement of this compound. The pseudo-merohedrally twinned crystals of NH4PO3(x) crystallize in the monoclinic crystal system (P2(1)/c, no. 14, a = 2270.3(5), b = 4.58.14(9) c = 1445.1(3)pm, beta = 108.56(3)degrees, Z = 4, 2264 data, R1 = 0.076). In the unit cell the catena-polyphosphate chain anions run parallel 0 10 with a chain-periodicity P = 2 and a stretching factor f(s) = 0.94. The chain anions are interconnected through extensive hydrogen bonding towards the ammonium ions. Due to 'chemical twinning' a novel catena-polyphosphate structure type is realized in NH4PO3(x) IV. The vibrational spectra of NH4PO3(x) IV are reported as well.
机译:在管式炉中,在氨气流下加热NH4H2PO4合成相纯儿茶那酸多磷酸铵IV[NH4PO3](x)。该产品含有[NH4PO3](x) IV的单晶,适用于X射线结构测定,从而能够改进该化合物的结构。[NH4PO3](x)的伪孪晶晶体在单斜晶系中结晶(P2(1)/c,编号14,a = 2270.3(5),b = 4.58.14(9) c = 1445.1(3)pm,β = 108.56(3)度,Z = 4,2264数据,R1 = 0.076)。在晶胞中,儿茶素-多磷酸链阴离子平行运行[0,10],链周期性P=2,拉伸因子f(s)=0.94。链式阴离子通过与铵离子的广泛氢键相互连接。由于“化学孪生”,在[NH4PO3](x) IV中实现了一种新的儿茶素-多磷酸盐结构类型。还报道了[NH4PO3](x) IV的振动光谱。

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