Microscopy Primer
Light and Color
Microscope Basics
Special Techniques
Digital Imaging
Confocal Microscopy
Live-Cell Imaging
Photomicrography
Microscopy Museum
Virtual Microscopy
Fluorescence
Web Resources
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
BeerShots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

Polarized Light Microscopy Digital Image Gallery

Phlogopite

Micas are a large group of silicate minerals that are best known for their perfect basal cleavage, which enables one to separate them into very thin, flexible sheets. Phlogopite, which is sometimes known as brown mica, is one of the most commercially important micas.

A hydrous silicate of potassium, magnesium, and aluminum, phlogopite often exhibits an unusual copperlike or bronze-red color, though it may also be yellowish or greenish hued. The precise coloration of the substance primarily depends upon its iron content, which also affects the density of the mineral. Phlogopite is usually formed metamorphically, but may also develop from plutonic forces. Significant deposits of the mica, which often appears as brown flecks in crystalline dolomite and marble, can be found within the United States in New York and New Jersey, as well as in various other parts of the world, such as Finland and Canada.

Phlogopite is closely related to, and is often found with, biotite. It is the amount of iron found within the minerals that chiefly distinguishes them from one another, biotite containing significantly greater amounts of the metallic element than phlogopite. Due to its low iron content, phlogopite forms a good insulator and is widely utilized for such purposes in the electrical industry. Due to the commercial value of the mineral, several attempts to synthesize it the laboratory have been made. However, the synthesis of phlogopite remains cost prohibitive, it generally being considered much cheaper to obtain the natural mineral.


BACK TO THE ROCKS AND MINERALS GALLERY

BACK TO THE POLARIZED LIGHT GALLERY

Questions or comments? Send us an email.
© 1998-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Tuesday, Jul 25, 2006 at 10:34 AM
Access Count Since November 20, 2003: 9477
For more information on microscope manufacturers,
use the buttons below to navigate to their websites: