Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A gray mineral, chiefly KAl3(SO4)2(OH)6, used in making alum and fertilizer.
from The Century Dictionary.
- noun Same as
alum-stone .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) Alum stone.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A gray, water-soluble
mineral ,potassium aluminium sulphate ; the natural source ofalum ,K Al 3(S O 4)2(OH )6.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Enough potash, however, is obtained in the United States for munition purposes from the burning of seaweed on the Pacific Coast, from the brines in a lake in Southern California and from a rock called alunite in Utah.
My Four Years in Germany Gerard, James W 1917
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Pacific Coast, from the brines in a lake in Southern California and from a rock called alunite in Utah.
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For each, there are several kinds of geologic concentrations that represent actual or potential resources; consequently, for each we may expect the depletion history to consist of a series of production-history curves, as availability and cost dictate a steplike descent from high-grade hematite to taconite to iron-rich intrusive bodies, and from bauxite to alunite to high-alumina clays.
Limits to Exploitation of Nonrenewable Resources (historical) Earl Cook 2007
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Minor amounts have been extracted in Utah from the mineral alunite (a sulphate of potassium and aluminum), in Wyoming from leucite (a potassium-aluminum silicate), in
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In the Goldfield camp (p. 230) the ores are closely associated with alunite in such a manner as to suggest a common origin.
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It has been found difficult to explain the presence of the alunite except through the agency of surface oxidizing waters acting on hydrogen sulphide coming from below.
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One of the interesting features of this occurrence is the abundance of alunite.
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Various potassium silicates -- leucite, feldspar, sericite, and glauconite -- and the potassium sulphate, alunite, have received attention and certain of them have been utilized to a small extent, but none of them are normally able to compete on the market.
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At Goldfield, Nevada, native gold is found in surface igneous flows of a dacite type, which have undergone extensive hydrothermal alterations characterized by the development of alunite (a potassium-aluminum sulphate), quartz, and pyrite.
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Of other natural mineral sources, alunite is the most important.
hernesheir commented on the word alunite
A.k.a. aluminilite.
June 2, 2010