Assertion: cryolite's amount | /r/HasProperty | lost in final waste products
Facets:
Source sentences:
text: However, disadvantages have been found in these methods because in' some of them the product'contains undesirable and harmful impurities, such as silica and alumina; and in some, at least, of the processes the fluoride values, which are scarce and costly, are not economically recovered, and, in fact, appreciable amounts thereof are lost in the final waste products.