This applies to the sulphate of copper and barium process.
"Scientific American Supplement, No. 514, November 7, 1885" by Various
What weight of barium sulphate will be formed at the same time?
"An Elementary Study of Chemistry" by William McPherson
Barium is estimated quantitatively by conversion into the sulphate.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3" by Various
The mineral barite is a heavy white sulphate of barium, frequently called "barytes" or "heavy spar.
"The Economic Aspect of Geology" by C. K. Leith
Barium carbonate and potassium sulphate, 328.
"The Phase Rule and Its Applications" by Alexander Findlay
To the filtrate ammonia is added, and then barium chloride, which precipitates the sulphur as barium sulphate.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
In the same way, black fixe and barytes, or barium sulphate, also appeared to be useful in strengthening a paint.
"Paint Technology and Tests" by Henry A. Gardner
In the visible region of the optical spectrum volume disordered media, e.g. compacted powdered barium sulphate, and freshly smoked magnesium oxide are used as Lambertian diffusers.
Design of one-dimensional Lambertian diffusers of light