981. Barium Manganate(VI)

Nomenclature

CAS number: 7787-35-1
Manganese green; Cassel's green; Rosenstiehl's green.
BaMnO4; mol wt 256.26.
Ba 53.59%, Mn 21.44%, O 24.97%.

Description and references

Prepn: Schlesinger, Stems, J. Am. Chem. Soc. 46, 1965 (1924); Jellinek, J. Inorg. Nucl. Chem. 13, 329 (1960); R. S. Nyholm, P. R. Woolliams, Inorg. Synth. 11, 56 (1968); Bayan, Aymonino, Ber. 101, 3337 (1968); H. Firouzabadi, Z. Mostafavipoor, Bull. Chem. Soc. Jpn. 56, 914 (1983).

Properties

Dark blue-green crystals. d 4.85. Disproportionates in water or dil acid to form Ba(MnO4)2 and MnO2.

Use

As pigment in fresco painting instead of Scheele's green because not so poisonous as latter. As mild oxidizing agent in organic synthesis.