更多fluorspar例句

1. The oxyfluoride, CrO2F2, is obtained in a similar manner to the oxychloride by using fluorspar in place of common salt.
2. The crystals occurred in association with topaz, fluorspar and cassiterite; but they were mostly of rather pale colour.
3. Hydrofluoric acid is readily obtained from fluorspar by the action of concentrated sulphuric acid.
4. A mixture of fluorspar and sulphuric acid is then painted over the vessel and after a few minutes the vessel is washed clean.
5. Fluorspar has already been mentioned as the chief natural compound of fluorine.