riebeckite

[ ree-be-kahyt ]

noun

1. an amphibolic mineral, silicate of sodium and iron, occurring usually in feldspathoid rocks.

Word History and Origins

Origin of riebeckite¹

1885–90; named after Emil Riebeck (died 1885), German explorer; -ite ¹

Example Sentences

It is a blue fibrous mineral belonging to the amphibole group and closely related to riebeckite; chemically it is an iron sodium silicate.

From Project Gutenberg

Its essential constituents are felspar, quartz and riebeckite—a soda amphibole.

From Project Gutenberg

This island is composed of micro-granite with riebeckite, of great interest on account of the rare occurrence of this type in Britain.

From Project Gutenberg