ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of iron(II) oxide in tourmalines

D. Weiss

Geologisches Zentralinstitut, Prag 7

Abstract: A resistent borosilicate is decomposed by melting with a mixture of potassium hydrofluoride, ammonium fluoride and orthophosphoric acid in a special glass apparatus. After dissolving the melt in dilute sulfuric acid, the content of iron(II) oxide is determined by titration with potassium bichromate by using Potentiometrie indication. The total content of iron can be determined by titanium(III) chloride, too. The method is suitable for samples containing more than 2% of iron(II) oxide.

Full paper in Portable Document Format: 239a671.pdf (in German)

Chemical Papers 23 (9) 671–676 (1969)