Die Kristallstruktur von Tetraaquo-Berylliumnitrat, Be(OH2)4(NO3)2

Die Kristallstruktur von Tetraaquo-Berylliumnitrat, Be(OH2)4(NO3)2
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四水硝酸铍的晶体结构,Be(OH2)4(NO3)2

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发表时间:
1976
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影响因子:
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通讯作者:
B. Ribár
B. Ribár
中科院分区:
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文献类型:
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作者:
V. Divjakovič;A. Edenharter;W. Nowacki;B. Ribár

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通过 X 射线研究四水硝酸铍。该晶体为四方晶系,空间群I42d,a = 11.636 ä,c = 6.252 ä,晶胞中有4个分子式单元Be(0H2)4(N03)2; dx = 1.60,doba = 1.59 克/厘米 3 。该结构是通过直接方法找到的,并通过全矩阵最小二乘程序将所有 258 个独立反射的 R 值细化为 6.2°/o。 Be a tom aro 几乎有规则地由 4 个水氧 a tom 组成四面体,距离为 1.616 Å。 Be(OH2)4 阳离子通过氢键与 (NO3) 阴离子连接。由于Be和N原子占据特殊位置,该结构由垂直于c轴、距离c/8的交替层构成。
Tetraaquo beryllium ni t ra te was invest igated by x-rays. The crystals are te t ragonal , space group I42d with a = 11.636 Ä, c = 6.252 Ä and 4 formula uni ts Be(0H2)4(N03)2 in the uni t cell; d x = 1.60, doba = 1.59 g/cm . The s t ruc ture was found by direct methods and refined by full matr ix least-squares procedure to an R value of 6.2°/o for all 258 independent reflections. The Be a toms aro coordinated almost regularly te trahedral ly by 4 water oxygen a toms a t a distance of 1.616 Ä. The Be(OH2)4 cations are connected by hydrogen bonds to the (NO3) anions. Because the Be and Ν a toms occupy special positions, the s t ructure is built up of a l ternat ing layers perpendicular to the c axis a t a distance of c/8.