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首页> 外文期刊>Corrosion science >Characterization of a new efflorescence salt on calcareous historic objects stored in wood cabinets: Ca_2(CH_3COO)(HCOO)(NO_3)_2·4H_2O
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Characterization of a new efflorescence salt on calcareous historic objects stored in wood cabinets: Ca_2(CH_3COO)(HCOO)(NO_3)_2·4H_2O

机译:一种新的风化盐对存储在木柜中的钙质历史古迹的表征:Ca_2(CH_3COO)(HCOO)(NO_3)_2·4H_2O

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摘要

White efflorescence crystals grown on the surfaces of a bronze bowl, classical ceramic and ancient wine jugs were investigated. X-ray powder diffraction (XRPD) revealed that in each case an identical, hitherto unknown phase was formed. The crystal structure was solved from high resolution XRPD measurements and revealed a phase composition of Ca-2(CH3COO)(HCOO)(NO3)(2)center dot 4H(2)O, which is in accordance with the complementary analysis. The overall structural motif of Ca-2(CH3COO)(HCOO)(NO3)(2)center dot 4H(2)O, one dimensional calcium carboxylate zig zag chains in which acetate and formate ions are arranged in an alternating fashion, is closely related to other naturally occurring or artificial efflorescence salts like thecotrichite or calclacite.
机译:研究了在青铜碗,古典陶瓷和古代酒罐表面上生长的白色风化晶体。 X射线粉末衍射(XRPD)表明,在每种情况下都形成相同的迄今未知的相。晶体结构通过高分辨率XRPD测量得到解析,并揭示了与互补分析一致的Ca-2(CH3COO)(HCOO)(NO3)(2)中心点4H(2)O的相组成。 Ca-2(CH3COO)(HCOO)(NO3)(2)中心点4H(2)O的整体结构基序是紧密相联的,一维羧酸钙之字形链中乙酸盐和甲酸盐离子交替排列与其他天然或人工风化盐有关,如方长石或方解石。

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