apatite

Definitions

  • WordNet 3.6
    • n apatite a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
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Webster's Revised Unabridged Dictionary
    • n Apatite (Min) Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.
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Century Dictionary and Cyclopedia
    • n apatite Native calcium phosphate with calcium fluorid or chlorid, generally crystallized in hexagonal prisms, which are sometimes low or even tabular, sometimes elongated, and occasionally of great size. It varies in color from white to green or blue, rarely to yellow or reddish. Apatite occurs in metalliferous veins and in metamorphic and granitic rocks. In Canada and in Norway extensive deposits of it are mined for the sake of its phosphates, which are useful as fertilizers.
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Chambers's Twentieth Century Dictionary
    • n Apatite ap′a-tīt a phosphate of lime of great variety of colour.
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Etymology

Webster's Revised Unabridged Dictionary
Gr. deceit, fr. to deceive; it having been often mistaken for other minerals
Chambers's Twentieth Century Dictionary
Gr. apatē, deceit, its form and colour being deceptive.

Usage

In literature:

Phosphorite is another name for apatite, but is chiefly applied to impure amorphous apatite.
"Manures and the principles of manuring" by Charles Morton Aikman
Apatite is especially abundant in some pegmatites.
"The Economic Aspect of Geology" by C. K. Leith
Other minerals, except apatite, zircon and magnetite, are typically absent.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
With regard to its mode of occurrence, apatite is found under a variety of conditions.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various
Apatite supplies to soils almost all the phosphorus available for plants in a state of nature.
"The New Gresham Encyclopedia. Vol. 1 Part 2" by Various
The "asparagus-stone" is a form of apatite, simulating asparagus in colour.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7" by Various
Biotite, if present, is brown; epidote is yellow or colourless; rutile, apatite and quartz all occur with some frequency.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6" by Various
Apatite, zircon and iron oxides, in small crystals, are always present.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3" by Various
Apatite and topaz are both colourless and of irregular form.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5" by Various
The principal accessory minerals are titaniferous iron oxides and apatite.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various
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In news:

Apatite Fiber Absorbable Composites for Load-Bearing Applications in Bone Fixation.
To pinpoint a date for the canyon 's carving, Flowers and her colleagues measured helium levels in a mineral called apatite, which comes from granitic rocks formed below Earth's surface more than a billion years ago.
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