Definitions
from The Century Dictionary.
- A mineral or salt occurring in masses of a fibrous structure, of a brick-red color, being tinged with iron.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
mineral usually occurring infibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates oflime ,magnesia , andsoda .
Etymologies
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Examples
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That boom has the blessing of the national government, whose regional growth fund awarded Cleveland Potash a £15-million $23.4-million grant to build a polyhalite processing facility in the Tees Valley.
The Globe and Mail - Home RSS feed WILLIAM MACNAMARA 2011
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Weeks later, however, the company said that the first drilling work had found a seam of polyhalite that was four times thicker than expected.
The Globe and Mail - Home RSS feed WILLIAM MACNAMARA 2011
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It is targeting the deep layer of polyhalite - a material that can be processed in potash fertilizer - that Sirius also plans to extract.
The Globe and Mail - Home RSS feed WILLIAM MACNAMARA 2011
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The potassium salts like carnallite, langbeinite, polyhalite, and sylvite are found in ancient lake and sea beds.
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