T O P

Phosphate Rock - an overview | ScienceDirect Topics

Phosphate rock (phosphorite) is a marine sedimentary rock that contains 18–40% P 2 O 5, as well as some uranium with all its decay products, often 70–200 ppm U, and sometimes up to 800 ppm. The main mineral in the phosphate rock is apatite, and most commonly, fluorapatite—Ca 5 (PO 4) ...

Apatite - rocksandminerals4u.com

Apatite is the name given to a group of phosphate minerals that are widely distributed in all rock types, usually in tiny crystals spread throughout the host rock. It is often green in color but can also be blue, or yellow. It can form large crystals in contact metamorphic rocks. It is the mineral that makes up tooth enamel in all vertebrate animals.

Mining Funda: Apatite, Phosphorite and Phosphate Rock

Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties. They are an important constituent of phosphorite, a rock mined for its phosphorus content and used to make fertilizers, acids, and chemicals.

APATITE AND ROCK PHOSPHATE Indian Minerals Yearbook …

APATITE AND ROCK PHOSPHATE 1 Apatite and Rock Phosphate Apatite is the most abundant crystalline phosphate mineral found as an accessory mineral in practically all kinds of igneous rocks. Sometimes, it is concentrated in pegmatites, metallic veins and magmatic deposits. It also occurs in metamorphic rocks and as a secondary

Phosphate vs Apatite - What's the difference? | WikiDiff

As nouns the difference between phosphate and apatite is that phosphate is (chemistry) any salt or ester of phosphoric acid while apatite is (mineral) a calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer. As a verb phosphate is to treat or coat with a …

APATITE AND ROCK PHOSPHATE Indian Minerals Yearbook …

APATITE AND ROCK PHOSPHATE 1 Apatite and Rock Phosphate A patite is a group of phosphate minerals and named by German Geologist Abraham Werner in 1786. It is the most abundant crystalline phosphate mineral found as an accessory mineral in practically all kinds of igneous rocks. Sometimes, it is concentrated in pegmatites, metallic veins and

Apatite | Ca5FO12P3 - PubChem

Phosphate rock minerals are the only significant global resources of phosphorus. The United States is the world's leading producer and consumer of phosphate rock, which is used to manufacture phosphate fertilizers and industrial products.

Apatite Meaning & Healing Properties | Energy Muse

Apatite Meaning & Healing Properties Give in to the inspirational qualities of the Apatite crystal stone and encourage a peaceful respite from the confusion that comes from adulting in the modern world. The Apatite crystal stone helps to reawaken a sense of clarity that lights the path to self-expression.

Apatite Stone; Uses, Benefits And Meaning

Jan 01, 2018· The apatite name derives from the Greek word meaning deceptive. Because apatite stone types are easily mixed with other minerals in appearance. Beryl, tourmaline, quartz, ovilin are some of these. Apatite is a common name for three groups of minerals. The most common ones are fluoro-apatite, the lesser chlor-apatite and the hydroxyl-apatite ...

APATITE (Calcium (Fluoro-, Chloro-, Hydroxyl-) Phosphate)

Get it? Apatite - teeth! Anyway, the name apatite comes from a Greek word meaning to decieve in allusion to its similarity to other more valuable minerals such as olivine, peridot and beryl. Apatite is widely distributed in all rock types; igneous, sedimentary and metamorphic, but is usually just small disseminated grains or cryptocrystalline ...

Phosphorus Fertilizer Production and Technology - ipni.net

The most common raw material ⠀ used in commercial P fertilizer production is PR which contains a calcium phosphate minera൬ called apatite. Phosphate rock is produced in several countries. There are two main types of PR deposits: sedimentary and igneous.

Apatite: The mineral apatite information and pictures

Apatite is the main source of phosphorus. Phosphorus was previously extracted from crystalline Apatite, but nowadays is extracted from enormous deposits of Apatite-rich rock. Apatite is essential in the manufacture of phosphate fertilizers, and is very important …

Apatite - Wikipedia

Phosphate rock solubility tests Apatite solubility. The three solutions commonly used to measure the solubility (reactivity) of direct application phosphate rock (DAPR) are neutral ammonium citrate (NAC), 2-percent citric acid (CA), and 2-percent formic acid (FA). The methods used to measure the solubility of PR rock stem from procedures used ...

Phosphate Rock

It contains over 30 percent total phosphate (3-8 percent available) and 48 percent calcium (as CaO). Phosphate rock has approximately one fifth the neutralizing power of lime. Natural rock phosphates are from deposits of apatite rock formed eons ago by sea life that left behind fossils and shells composed primarily of calcium phosphates.

Geochemistry of Uranium in Apatite and Phosphorite

THE GEOCHEMISTRY OF URANIUM IN APATITE AND PHOSPHORITE By Z. S. ALTSCHULEK, K. S. CLAKKE, JR., and E. J. YOUNG ABSTRACT Apatite contains only traces of uranium, yet as apatite is a minor constituent in most rocks and the major constituent of a few very large deposits, it accounts, paradoxically, for both

Apatite - Mineral and Healing Properties

Blue apatite is a prized mineral specimen by rock collectors for its vibrant royal blue color. Most of the apatite rock mined throughout the world is used to produce phosphate fertilizer. It is also used to produce animal feed supplements, phosphoric acid, elemental phosphorous, and phosphate compounds for the chemical industry.

Apatite: the great unknown gemstone | The Jewellery Editor

Nov 14, 2016· To protect the surface of an apatite stone on a ring, for example, Frantzi employs a doublet in which a slice of rock crystal is placed on top of the apatite. The doublet of rock crystal can be faceted or left in the rough, creating some spectacular effects and providing a roof over the apatite…

Phosphate Rock | Mosaic Crop Nutrition

Direct use of phosphate rock avoids the extra processing associated with converting apatite to a soluble form. The minimal processing may result in a lower-cost nutrient source and make it acceptable for organic crop production systems.

(PDF) Phosphates for Pb immobilization in soils: A review

Numerous natural and synthetic phosphates materials have been used to immobilize Pb: apatite and hydroxyapatite, biological apatite, rock phosphate, soluble phosphate fertilizers such as ...

Use of phosphate rocks for sustainable agriculture

Phosphate is the component of agronomic interest in these rocks. The higher the phosphate (P 2 O 5) content as apatite, the greater the economic potential of the rock. Factors that are important in the chemical conversion of PRs to fertilizer (free carbonates, iron (Fe), aluminium (Al), magnesium (Mg) and chloride) are often not important where ...

KIDNEY STONE TYPES | Kidney Stone Evaluation And Treatment ...

Calcium phosphate crystals Phosphate ion and urine pH. Calcium phosphate stone crystals form when calcium atoms combine with phosphoric instead of oxalic acid and produce the calcium phosphate kidney stone. Phosphoric acid is simply a phosphorus atom (shown as the 'P' in the line drawing to the left) with 4 oxygen atoms bonded to it.

Apatite Mineral | Physical - Optical Properties ...

Phosphate rock and phosphorite are names used for sedimentary rocks that contain at least 15% to 20% phosphate on the basis of weight. The phosphorous content in these rocks is mainly derived from the presence of apatite minerals. Uses of Apatite as Phosphate Rock. Most of the phosphate rock mined throughout the world is used to produce ...

Apatite: Mineral information, data and localities.

"Apatite" is a field term for unidentified calcium phosphate members of the apatite group. Most "apatite" is fluorapatite, whereas hydroxylapatite is much less common and chlorapatite is very rare. "Apatite" crystals are short to long hexagonal prisms [0001], with {10 1 0} and {10 1 1} dominant; also thick tabular {0001}, frequently in the crystals of hydrothermal origin in pegmatites and ...

Mineral Resource of the Month: Phosphate Rock | EARTH Magazine

As a mineral resource, "phosphate rock" is defined as unprocessed ore and processed concentrates that contain some form of apatite, a group of calcium phosphate minerals that is the primary source for phosphorus in phosphate fertilizers, which are vital to agriculture.

(PDF) Reagents used in the flotation of phosphate ores: A ...

PDF | Phosphate rock needs processing to reduce the content of gangue minerals such as silicates, carbonates, and clays to meet the requirements of the phosphate industry. Froth flotation method ...