Abstract 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 (CH 3 COO)(HCOO)(NO 3 ) 2 ·4H 2 O, which is in accordance with the complementary analysis. The overall structural motif of Ca 2 (CH 3 COO)(HCOO)(NO 3 ) 2 ·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.

中文翻译：

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一种新的风化盐在木柜中储存的石灰质历史物体上的表征：Ca 2 (CH 3 COO)(HCOO)(NO 3 ) 2 ·4H 2 O

摘要 研究了青铜碗、古典陶瓷和古代酒壶表面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了相同的、迄今为止未知的相。从高分辨率 XRPD 测量中解析出晶体结构，并揭示了 Ca 2 (CH 3 COO)(HCOO)(NO 3 ) 2 ·4H 2 O 的相组成，这与互补分析一致。Ca 2 (CH 3 COO)(HCOO)(NO 3 ) 2 ·4H 2 O 的整体结构基序是一维羧酸钙锯齿形链，其中乙酸根和甲酸根离子以交替方式排列，与其他结构密切相关。天然存在的或人工的风化盐，如thecotrichite或方解石。