Leave a message
Mon
9
May

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 Carmichaelite is indicated by (Ti,Cr,Fe)[O2-x(OH)x],x~0.5. This is microscopic inclusions in mantle-derived pyrope crystals. The mineral is inferred to have co-precipitated with the pyrope host in the presence of a fluid or melt phase at 650-750 de g C and 20-25 kbar pressures. This mineral Carmichaelite is usually found occuring at its type of locality at Garnet Ridge, an ultramafic diatreme on the Colorado Plateau in Arizona, USA. Mineral Carmichaelite was named for Ian S. E. Charmchael, Professor of Geology at the University of California, Berkeley, in recognition. This mineral Carmichaelite is known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Mineral Carmichaelite has no cleavage found even when closely evaluated with the aid of polarizing microscopes used in the field of optical mineralogy. Mineral Carmichaelite is most commonly found colored cinnamon brown or black in hand sample. Most crystals of mineral Carmichaelite are found opaque to translucent in appearance. Mineral Carmichaelite is usually found showing brittle to conchoidal fracure. This is a very brittle fracture producing small, conchoidal fragments. Sometimes it can be found with inclusions. This is generally found as inclusions in other minerals. Mineral Carmichaelite is also sometimes found forming microscopic crystals where crystals are visible only when evaluaed with the aid polarized microscopes. The hardness measure of mineral Carmichaelite is usually found 6 when evaluated using the Mohs scale method. Mineral Carmichaelite is also commonly found exhibiting metallic luster when evaluated in reflected light of polarizing microscopes. Mineral Carmichaelite is also showing biaxial figure when evaluated between crossed nicols of polarizing microscopes. Mineral Carmichaelite is found to be not radioactive.



Author:
Time:
Monday, May 9th, 2011 at 6:25 am
Category:
Optical Mineralogy
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