Bert, L. Bulletin de la Societe Chimique de France, 1922 , vol. 31, p. 1264 - 1270 Full Text Show Details Ruff, O. Ber., 1901 , vol. 34, p. 3509 - 3515 Full Text Show Details Gmelin Handbook: S: MVol.B3, 131, page 1807 - 1808