Leave a message
Fri
30
Oct

Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Xenotime is indicated by YPO4 or Yttrium Phosphate. Xenotime is actually a Phosphate mineral. It is a known source of Yttrium and it is also most commonly used as mineral specimen. Xenotime is only one of the few minerals that starts with the letter X. Xenotime is a widely spread mineral throughout the world although good crystals and therefore specimens are somewhat hard to find. Due to the presence of at least some of these radioactive elements, Xenotime is frequently slightly radioactive. It has been found that Xenotime also will contain traces of Silicon Dioxide and arsenate replacing the phosphate anion. It is also important to note that Xenotime is one of the few Phosphate minerals that do not contain water molecules, hydroxides or chlorides. It belongs to an informal group of Phosphates and called anhydrous phosphates along with monazite, Purpurite and lithiophyllite.

             When closely evaluated with the aid of polarizing microscope used in the field of optical mineralogy, the crystals of mineral Xenotime are similar to zircon and can easily be confused with the duller lustered, less transparent samples of zircon. However, the cleavage and the softness of Xenotime are sufficient to distinguish them. Xenotime is most commonly found various shades of brown but also gray, greenish brown, muted red and yellow that appears more splendidly wonderful when viewed with the aid of polarizing microscopes for mineralogists. Mineral Xenotime is most commonly found showing vitreous to resinous luster when viewed in reflected light of polarized microscopes. The crystals of mineral Xenotime are usually found translucent to opaque in appearance. The crystal habit of the mineral Xenotime usually include stubby to elongated prismatic crystals that are terminated by variously slanted dipyramids. Xenotime is also known for its nice rosette and radial aggregates that appears more fascinating when viewed with the aid of polarizing microscopes for mineralogists. Xenotime is known to crystallize in the tetragonal system of crystal formation. In optical mineralogy, this tetragonal system comprises crystals having three axes, which are all in a position perpendicular to one another. Two axes are usually found having the same or equal length.             Xenotime is usually found showing perfect cleavage in two prismatic directions which can be found more clearly visible when evaluated with the aid of polarizing microscopes used in the field of optical mineralogy. It is also most commonly found showing uneven fracture when viewed with the aid of polarizing microscopes for mineralogists. The hardness measure of the mineral when it is closely evaluated using the Mohs scale method is usually ranging from 4 to 5. The specific gravity measure of the mineral is approximately 4.4 to 5.1 grams per cubic centimeters, which is heavy for translucent minerals. Mineral Xenotime is most commonly found leaving a pale brown to yellow or red streak when rubbed on a white porcelain streak plate. There can be some trace amounts of uranium and other rare earth elements may render crystals that are slightly radioactive. Xenotime is usually found associated with quartz, some feldspars and micas such as biotite and monazite. The best field indicators of mineral Xenotime usually include color, luster, crystal habit, softness and cleavage. Xenotime notably occurs at several localities including Norway, Madagascar, and several locations in Brazil as well as in United States.         



Author:
Time:
Friday, October 30th, 2009 at 3:02 pm
Category:
The Phosphates Mineral Class
RSS:
You can follow any responses to this entry through the RSS 2.0 feed.
Navigation:
Click Here For Best Selection Of High Quality Polarizing Microscope