草酸锰
| 草酸锰 | |||
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| 识别 | |||
| CAS号 | 640-67-5（无水）  6556-16-7（二水）
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| SMILES |
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| 性质 | |||
| 化学式 | C2MnO4 | ||
| 摩尔质量 | 142.96 g·mol−1 | ||
| 外观 | 白色固体[1] 粉色固体（二水）[2] | ||
| 密度 | 1.93 g·cm−3（三水） 2.241 g·cm−3（二水，α）[3] | ||
| 溶解性（水） | 不溶 | ||
| 溶度积Ksp | 1.7×10−7[4] | ||
| 若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |||
草酸锰是一种化合物，化学式为MnC2O4。
制备和性质
[编辑]硝酸锰和草酸铵在水溶液中反应，可以得到正交晶系的γ-MnC2O4·2H2O。MnC2O4·3H2O会经α-MnC2O4·2H2O（该相可由乙酸锰浓溶液反应制得[3]）转变为γ-MnC2O4·2H2O。[2]
草酸锰也可由乙酸锰四水合物和草酸铵一水合物在固相研磨后于80 °C反应得到。[1]
草酸锰受热可以分解，生成一氧化锰，在空气中加热时还会有氧化产物三氧化二锰生成：[5]
- MnC2O4 → MnO + CO + CO2
- 4 MnC2O4 + 3 O2 → 2 Mn2O3 + 8 CO2
参考文献
[编辑]- ^ 1.0 1.1 Anbao Yuan, Xiuling Wang, Yuqin Wang, Jie Hu. Textural and capacitive characteristics of MnO2 nanocrystals derived from a novel solid-reaction route. Electrochimica Acta. 2009-01, 54 (3): 1021–1026 [2020-11-20]. doi:10.1016/j.electacta.2008.08.057. （原始内容存档于2018-06-27） （英语）.
- ^ 2.0 2.1 Borjana Donkova, Georgi Avdeev. Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions. Journal of Thermal Analysis and Calorimetry. 2015-08, 121 (2): 567–577 [2020-11-20]. ISSN 1388-6150. doi:10.1007/s10973-015-4590-4 （英语）.
- ^ 3.0 3.1 Anna N. Puzan, Vyacheslav N. Baumer, Dmytro V. Lisovytskiy, Pavel V. Mateychenko. Structure disordering and thermal decomposition of manganese oxalate dihydrate, MnC2O4·2H2O. Journal of Solid State Chemistry. 2018-04, 260: 87–94 [2020-11-20]. doi:10.1016/j.jssc.2018.01.022. （原始内容存档于2020-02-19） （英语）.
- ^ John Rumble. CRC Handbook of Chemistry and Physics 99. CRC Press. June 18, 2018: 5–188. ISBN 978-1138561632 （English）.
- ^ Michael E. Brown, David Dollimore, Andrew K. Galwey. Thermal decomposition of Manganese(II) oxalate in vacuum and in oxygen. Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases. 1974, 70 (0): 1316 [2020-11-20]. ISSN 0300-9599. doi:10.1039/f19747001316 （英语）.
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