| Identification | Back Directory | [Name]
Phosphate rock and Phosphorite, calcined | [CAS]
65996-94-3 | [Synonyms]
Phospal
Calciphos
phosphorite
PHOSPHORITES
Phosphorite, calcined
Phosphate rock,calcined
Rock phosphate, calcined
Calcined phosphate rock and Phosphorite
Phosphate rock and Phosphorite, calcined | [EINECS(EC#)]
266-029-8 | [MOL File]
65996-94-3.mol |
| Hazard Information | Back Directory | [Chemical Properties]
Phosphate rock is a sedimentary phosphate mineral composed primarily of carbonaceous fluoroapatite. Gangue minerals include quartz, chalcedony, calcite, dolomite, hydromica, kaolinite, glauconite, and organic matter. Its color ranges from yellowish-brown, greenish-brown, light gray, dark gray, or black. Its hardness is 2-4, and its density is 2.8-3.0 g/cm??. Carbonaceous fluoroapatite occurs in two forms: one is a microcrystalline or cryptocrystalline aggregate with a strawberry, grape, or crust-like appearance; the other is an amorphous or microcryptocrystalline aggregate with a colloidal appearance, commonly known as "collophane." The latter is the most common form of phosphorite. Carbonaceous fluoroapatite is difficult to identify with the naked eye. However, if a nitric acid solution containing ammonium molybdate is dripped onto phosphorite, a ginger-colored precipitate of ammonium phosphomolybdate appears. Marine phosphorite deposits are often large in scale and have great industrial value. | [Definition]
Substance obtained by heating naturally occurring phosphate rock to 732.degree.C to 816.degree.C (1350.degree.F to 1500.degree.F) in a fluidized bed or other suitable device for oxidizing carbonaceous matter. Characterized by upgraded phosphorus content and reduced hydrocarbon levels. | [Agricultural Uses]
Phosphorite or mineral phosphate is made by grinding
rock phosphate, a natural mineral found in the form of
sedimentary rocks containing various calcium phosphates.
It is used as a phosphatic fertilizer, and is a primary
source of phosphorus. It is a mineral containing calcium
phosphate with hydroxyl groups or is hydroxy apatite.
Phosphorite is a continental phosphatic rock,
consisting of concretions of collophanite, found in
decalcification clays. The most famous phosphorites are
from Causses du Quercy (France). |
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