The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 1997 |
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Page 966
... mineral ; it is found only as an impurity in other minerals , ranging in content up to 5 percent in such minerals as lepidolite and pollucite . Brine samples have been analyzed that contain up to six parts per million of rubidium . The ...
... mineral ; it is found only as an impurity in other minerals , ranging in content up to 5 percent in such minerals as lepidolite and pollucite . Brine samples have been analyzed that contain up to six parts per million of rubidium . The ...
Page 977
... mineral deposits , can be ob- tained easily in the metallic state from those minerals , and are useful as metals and as alloys in many applications . Germanium , on the other hand , forms few characteristic minerals and is most commonly ...
... mineral deposits , can be ob- tained easily in the metallic state from those minerals , and are useful as metals and as alloys in many applications . Germanium , on the other hand , forms few characteristic minerals and is most commonly ...
Page 1013
... mineral species contain iron as a con- stituent , and igneous rocks average about 5 percent iron content . The major iron ores are the minerals hematite [ iron ( III ) oxide , Fe2O3 ] , magnetite [ triiron tetroxide , Fe3O4 ] , limonite ...
... mineral species contain iron as a con- stituent , and igneous rocks average about 5 percent iron content . The major iron ores are the minerals hematite [ iron ( III ) oxide , Fe2O3 ] , magnetite [ triiron tetroxide , Fe3O4 ] , limonite ...
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