roemerite Min.
(ˈrɜːməraɪt)
Also römerite.
[ad. G. römerit (J. Grailich 1858, in Sitzungsber. d. K. Akad. d. Wissensch. in Wien XXVIII. 272), f. the name of Friedrich Adolph Römer (1809–69), German geologist: see -ite1.]
A hydrated sulphate of ferrous and ferric iron, often containing zinc, which occurs as rust-brown to yellow triclinic crystals, usu. as an oxidation product of pyrite.
| 1877 E. S. Dana Text-bk. Mineral. iii. 373 Alum and Halotrichite Groups. Here belong: Tschermigite, ammonium alum. Kalinite, potassium alum... Also Roemerite, and Voltaite. 1903 Jrnl. Chem. Soc. LXXXIV. ii. 555 Römerite was prepared by allowing a mixture of powdered ferrous sulphate and acid ferric sulphate to remain in contact with moist air for several months. 1927 Amer. Mineralogist XII. 282 Chemically, roemerite is a double sulphate of ferrous and ferric iron, the ferrous iron of which may sometimes be replaced by zinc and magnesium, and the ferric iron by aluminum. 1970 Ibid. LV. 78 Roemerite is generally the result of an oxidation of iron sulfides. |