Assertion: synthetic cryolite | /r/HasAspect | a weight ratio of naf
Facets:
value: to alf
type: OTHER
Source sentences:
text: Method of producing a substantially silica-free synthetic cryolite having a weight ratio of NaF to AlF less than 1.5 to 1 by direct precipitation from a silica-containing system, comprising the steps of reacting a mixture of reactive alumina and at least one sodium compound selected from the group consisting of NaAlO NaOH, NaF, =Na CO and Na CO -AI