Century Dictionary and Cyclopedia
- n. The monoxid of strontium, SrO, an alkaline earth which when pure is an infusible grayish-white powder having an acrid burning taste. It is soluble in water with evolution of heat, slaking into a hydrate, Sr(OH)2, which is quite soluble and deposits from its solution crystals of the hydrate containing eight molecules of water of crystallization. The hydrate has a strong alkaline reaction, and is more caustic than lime, but less so than the alkalis. Strontia does not occur native, but is prepared by igniting the carbonate, the mineral strontianite.
GNU Webster's 1913
- n. (Chem.) An earth of a white color resembling lime in appearance, and baryta in many of its properties. It is an oxide of the metal strontium.
“Weigh five ounces of dry nitrate of strontia, one ounce and a half of finely-powdered sulphur, five drams of chlorate of potash, and four drams of sulphuret of antimony.”
“It states that if 10 per cent. of burnt magnesia, or even baryta, or strontia, is mixed (cold) with ordinary linseed-oil paint, and then enough mineral oil to envelop the alkaline earth, the free acid of the paint will be neutralized, while the iron will be protected by the permanent alkaline action of the paint.”
“The pigment, however, now sold as strontian yellow is usually formed by admixture, and contains no strontia whatever.”
“To justify its name, should be a chromate of strontia, a compound very slightly soluble in water, and not more stable than the zinc chromate.”
“Among them may be mentioned a red purpurate of lead, a purple-red and a rose-coloured purpurate of mercury, a purple-red purpurate of silver, a dark red-brown purpurate of strontia, a crystalline red purpurate of cobalt, a scarlet purpurate of platinum, a yellow purpurate of zinc, and a green purpurate of baryta.”
“It is advantageous to add to the wash water powdered carbonate of baryta, strontia, magnesia, or preferably lime, and subsequently to rinse in pure water.”
“Here is some which has been soaked in nitrate of strontia: you will see the beautiful red color of its flame; and here is another which I think contains baryta, which gives that fine green light; and I have here some more which has been soaked in nitrate of copper: it does not burn quite so brightly, but still very beautifully.”
“The paper is then saturated with chlorate of strontia, or chlorate of baryta, or nitrate of copper, by immersion in a warm solution of these salts (See Chemical News, vol. i., p. 36.) [back]”
“In the absence of baryta or lime it is filtered off, and weighed as strontium carbonate, which contains 70.17 per cent. of strontia.”
“The strontia is precipitated from the filtrate by boiling for some time with a strong solution of ammonic sulphate and a little ammonia.”
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