Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A sedimentary rock consisting predominantly of apatite and other phosphates.
from The Century Dictionary.
- noun A name applied originally to a massive variety of apatite, but now used to embrace the more or less impure earthy to compact calcium phosphate which forms beds of considerable magnitude in some localities (Estremadura in Spain, Bohemia, etc.), and is of much economic importance.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A massive variety of apatite.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy a
sedimentary rock rich inphosphate minerals such asapatite
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Gypsum, phosphorite, and salt are the major minerals mined in the state; there are also small deposits of gold and silver.
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Gypsum, phosphorite, and salt are the major minerals mined in the state; there are also small deposits of gold and silver.
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Phosphate rock is formed in oceans in the form of calcium phosphate, called phosphorite.
Phosphate rock 2008
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Near shore and offshore sediments hold rich deposits of minerals (diamonds, phosphorite, diatomite), as well as oil and gas reserves.
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This mineral is even less soluble than phosphorite, so that a direct application of apatite onto cultivated fields exhibits a fertilizing effect only after a period of 10 - 15 years.
Chapter 20 1993
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Now, the solubility of Thomas-slag in citrate of ammonia was found by Professor Wagner to be no less than 74 per cent, while that of phosphorite only amounted to 4 per cent.
Manures and the principles of manuring Charles Morton Aikman
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This was superseded by coprolites and Estremadura phosphorite, Suffolk coprolites being for many years the chief material employed.
Manures and the principles of manuring Charles Morton Aikman
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Professor Fleischer has also tested the comparative solubility of basic slag and phosphorite, by boiling them in a solution of acetic acid.
Manures and the principles of manuring Charles Morton Aikman
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This apatite, or phosphorite, is found in certain parts of the world in large masses; but as a rule, it only occurs in small quantities in most rocks.
Manures and the principles of manuring Charles Morton Aikman
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We have already referred in Chapter V. to large deposits of apatite or phosphorite found in Canada.
Manures and the principles of manuring Charles Morton Aikman
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