These four are baryta, strontia, lime (calcia), and magnesia.
The compounds of strontia are not poisonous, like those of baryta.
The only preparation of strontia used in the arts is the Nitrate, which see.
Strontium obtained from carbonate of strontia by Sir Humphry Davy.
The color produced by the sulphate of strontia is less intense.
strontia and baryta will flow into the charcoal, but lime will not.
Celestine, sel′es-tin, n. a mineral, native sulphate of strontia.
The bases of the four alkaline earths, baryta, strontia, lime and magnesia.
The hydrate of strontia has the same properties as the hydrate of baryta, except that it is less soluble in water.
This is what distinguishes lime from baryta and strontia, and is a good method of separating the former from the latter.
