SPI Supplies® Brand Mica Sheets and Discs
Information about the mica "group"
Stoichiometrically, all members of the "mica group" or "family" can be
described as follows:
AB2-3(Al, Si) Si3O10 (F,OH)2
A = K, Ca, Na, or Ba and sometimes other elements
B = Al, Li, Fe, or Mg
What is called the "Mica Group" by geologists consists of more than thirty members,
that is, more than thirty specific crystal structures, and with specific compositions.
Fortunately for the non-geologist not wanting to become a geologist, and wanting only to
know enough about these materials for use in microscopy and other analytical applications,
six forms make up most of the common types found in nature:
Biotite
Fuchsite
Lepidolite
Muscovite
Phlogopite
Zinnwaldite
The selection of muscovite as the mica of choice for applications in microscopy is
no accident: This form of mica produces the cleanest and most defect free surfaces
of the type highly desired for substrate materials. And SPI Supplies features
therefore, only the muscovite form of mica.
But be aware that muscovite comes in different "grades" and an
elaborate classification scheme
exists to definite the quality of muscovite mica.
To Ask a Question or Make a Comment
To Place an Order or Request a Quote
Return to:
Friday May 16, 2008
© Copyright 1996 - 2008. By Structure Probe, Inc.
Contacting SPI Supplies and Structure Probe, Inc.
All rights reserved.
All trademarks and trade names are the property of their respective owners.
Worldwide Distributors, Representatives, and Agents
