alkali feldspar

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Any of several feldspar minerals containing alkali metals and little calcium. Plagioclase, orthoclase and microcline are alkali feldspars.

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Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.

Question 1 of 8

Mississippi’s nickname comes from the magnificent trees that grow there. What is it?

What appears to be ground glass is only the little crystals or small particles of alkali that have not been dissolved.
Tobacco; Its History, Varieties, Culture, Manufacture and Commerce|E. R. Billings.
He was one of the men to whom alkali is a constant poison, and his lips were always cracked and bleeding.
Mystery Ranch|Arthur Chapman
He had come away in the sour mood of a thirsty man who finds an alkali spring sparkling deceptively under a rock.
Cabin Fever|B. M. Bower
Talpers flushed angrily, and then grinned, until his alkali-cracked lips glistened in the lamplight.
Mystery Ranch|Arthur Chapman

Now, cations other than the alkali ions are liable to interfere with tests designed for alkaline or neutral solutions.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2.|Julius Stieglitz