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磷酸镁

磷酸镁
IUPAC名
Trimagnesium Diphosphate
别名 磷酸三镁
识别
CAS号 10233-87-1
PubChem 24439
SMILES
 
  • [O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Mg+2].[Mg+2].[Mg+2]
InChI
 
  • InChI=1S/3Mg.2H3O4P/c;;;2*1-5(2,3)4/h;;;2*(H3,1,2,3,4)/q3*+2;;/p-6
Gmelin 15662
性质
化学式 Mg3O8P2
摩尔质量 262.86 g·mol−1
外观 白色晶体
熔点 1184 °C(1457 K)
溶解性 不可溶
溶解性 溶于盐溶液
磁化率 −167·10−6 cm3/mol (+4 H2O)
危险性
警示术语 R:R25, R36, R37, R38
NFPA 704
0
1
0
 
闪点 N/A
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

磷酸镁是一种无机化合物,化学式 Mg3(PO4)2.xH2O。 它是磷酸盐,结晶水数量为:x = 0, 5, 8, 22.[1]

磷酸二氢镁氢氧化镁反应时,会形成八水合磷酸镁。

Mg(H2PO4)2 + 2 Mg(OH)2 → Mg3(PO4)2•8H2O

在自然界中可以发现八水合磷酸镁,以矿物质白磷镁石的形式存在。 [2]

通过将水合物加热至400℃可获得无水磷酸镁。它与磷酸钴是同构的。 金属离子以1∶2的比例同时占据八面体形分子构型(六配位)和五配位的位置。 [3]

安全性

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磷酸镁已列在FDA的公认安全,又称GRAS的物质清单中。 [4]

参见

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参考资料

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  1. ^ Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann. Phosphoric Acid and Phosphates. Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. 2008. ISBN 978-3527306732. doi:10.1002/14356007.a19_465.pub3. 
  2. ^ magnesium phosphate - Compound Summary. [29 May 2012]. 
  3. ^ Nord, A. G.; Stefanidis, T. Structure of cobalt(II) phosphate Structure Refinements of Co3(PO4)2. A Note on the Reliability of Powder Diffraction Studies. Acta Chemica Scandinavica A. 1983, 37: 715–p721. doi:10.3891/acta.chem.scand.37a-0715可免费查阅. 
  4. ^ TRIMAGNESIUM PHOSPHATE. [29 May 2012]. 
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磷酸镁
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