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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.

Strontia.

Strontium carbonate, a mineral of a white, greenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals.

having the properties of an alkali. Alkaline earths, certain substances, as lime, baryta, strontia, and magnesia, possessing some of the qualities of alkalies. -- Alkaline metals, potassium, sodium, cæsium, lithium, rubidium. -- Alkaline reaction, a reaction indicating alkalinity, as by the action on limits, turmeric…

monoclinic crystals with pearly luster. It is a hydrous silicate of aluminia, baryta, and strontia.

A carbonate of baryta and lime, intermediate between witherite and strontianite; -- called also alstonite.

A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta.

lic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3. A radioactiv…