phosphate minerals

Where present, rare earth metals tend to associate with phosphate minerals.

Phosphate minerals have special characteristics about their chemical composition.

This is because of the large deposit of phosphate minerals that have been discovered in the area.

Kolbeckite is usually found as small clusters of crystals associated with other phosphate minerals.

It occurs in pegmatite associated with other phosphate minerals.

This mineral is found in phosphate mines, along with other phosphate minerals.

Two distinct routes are employed, the main one being treatment of phosphate minerals with sulfuric acid.

This is an important geologic location that has provided the discovery of several phosphate minerals which have been previously unknown.

Phosphates are the naturally occurring form of the element phosphorus, found in many phosphate minerals.

Typically occurs very late in the sequence of formation of secondary phosphate minerals.

Bioclastic phosphates can also be cemented by phosphate minerals.

Other sources also include chemically dissolved phosphate minerals from igneous and metamorphic rocks.

Structure and chemistry of phosphate minerals.

It typically occurs as hydrothermal alteration of primary phosphate minerals in granite pegmatites.

In return, the Soviet Union supplied their allies with timber, ores and apatites (phosphate minerals).

Phosphate minerals are fossils.

Both the Dana and the Strunz mineral classifications place the antimonates in with the phosphate minerals.

Phosphate minerals include:

It is a rare secondary mineral found in complex granite pegmatites where it forms by weathering of earlier phosphate minerals.

However, it differs considerably from most other phosphate minerals, including apatite, in its chemical composition and the molar proportions of these components.

Some of the green to green yellow shades may actually be variscite or faustite, which are secondary phosphate minerals similar in appearance to turquoise.

Because the composition of apatite varies, the term 'apatite' is often used to describe a variety of different phosphate minerals.

Phosphate minerals have one or more metal cations bonded to the phosphate anion PO.

Phosphate minerals are often used for control of rust and prevention of corrosion on ferrous materials applied with electrochemical conversion coatings.

The concentration of up to 100 mg/kg of cadmium in phosphate minerals (for example, minerals from Nauru .