草酸铍

草酸铍是一种无机化合物，化学式为BeC
2O
4，是铍的草酸盐。^[3]它是无色晶体，可溶于水，可以形成水合物晶体。它经热分解^[4]可以用来制备高纯度的氧化铍。^[5]

草酸铍
识别
CAS号	3173-18-0（无水）  Y 15771-43-4（三水）  Y 15697-24-2（一水）  Y
ChemSpider	4953986
SMILES	[Be+2].C(=O)(C(=O)[O-])[O-]
InChI	1S/C2H2O4.Be/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2
InChIKey	XQZGLPVUHKSNBQ-UHFFFAOYSA-L
性质
化学式	C 2BeO 4
摩尔质量	97.03[1] g·mol⁻¹
外观	透明晶体
沸点	365.1 °C（638 K）
溶解性（水）	63.2 g（三水，25 °C）[2]
相关物质
相关化学品	Calcium oxalate Sodium oxalate Magnesium oxalate Strontium oxalate Barium oxalate Iron(II) oxalate Iron(III) oxalate Lithium oxalate
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

制备

草酸铍可由草酸和氢氧化铍反应得到：^[6]

${\displaystyle {\mathsf {Be(OH)_{2}+H_{2}C_{2}O_{4}\ {\xrightarrow {}}\ BeC_{2}O_{4}+2H_{2}O}}}$

性质

草酸铍的水合物加热失水：

${\displaystyle {\mathsf {BeC_{2}O_{4}\cdot 3H_{2}O\ {\xrightarrow[{-2H_{2}O}]{100^{o}C}}\ BeC_{2}O_{4}\cdot H_{2}O\ {\xrightarrow[{-H_{2}O}]{220^{o}C}}\ BeC_{2}O_{4}}}}$

需要指出的是，三水合物在50 °C便可缓慢失水，生成一水合物。^[7]

参考文献

1. BERYLLIUM OXALATE. chemicalbook.com. [15 June 2021]. （原始内容存档于2022-02-04）.
2. Wirth, Fritz. Oxalates and acetates of beryllium. Zeitschrift fuer Anorganische Chemie, 1914. 87: 7-8.
3. Novoselova, Aleksandra Vasilʹevna; Bat︠s︡anova, Li︠u︡dmila Rafailovna. Analytical Chemistry of Beryllium. Ann Arbor-Humphrey Science Publishers. 1969: 25 [15 June 2021] （英语）.
4. Walsh, Kenneth A. Beryllium Chemistry and Processing. ASM International. 2009-01-01: 125 [15 June 2021]. ISBN 978-0-87170-721-5 （英语）.
5. Dollimore, David; Konieczay, Julie L. The thermal decomposition of beryllium oxalate and related materials. Thermochimica Acta. 1998-09-07, 318 (1–2): 155–163 [15 June 2021]. doi:10.1016/S0040-6031(98)00340-2. （原始内容存档于2022-04-01） （英语）.
6. Moore, Raymond E. Purification of Beryllium Compounds: A Literature Survey. Oak Ridge National Laboratory. 1960: 6 [15 June 2021] （英语）.
7. Hamner, R. L.; Harris, L. A. Calcination in air of beryllium oxalate trihydrate to beryllium oxide. United States Atomic Energy Commission [Unclassified and Declassified Reports Published by the Atomic Energy Commission and Its Contractors], 1961. ORNL-3183.

延伸阅读

• Sidgwick, Nevil V.; Lewis, Neil B. CLXVI.—The solubility of beryllium oxide in solutions of its salts. J. Chem. Soc. 1926, 129 (0): 1287–1302. ISSN 0368-1769. doi:10.1039/JR9262901287.