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Analysis of Talc by X-ray Diffraction and Polarized Light Microscopy.

Authors
McCrone-LB
Source
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Contract 210-75-0063, 1977 May; :1-75
Link
NIOSHTIC No.
00082586
Abstract
An analysis of talc (14807966) by X-ray diffraction and polarized light microscopy is reported. One hundred samples of talc from different mines supplied by NIOSH were analyzed using X-ray diffraction and polarized light microscopy. X-ray analysis was performed with nickel filtered copper radiation using line scanning from 4 to 70 degrees 2 theta. The samples were found to consist of from 1% to 99% talc in combination with 23 minerals which are listed along with their X-ray diffraction peak assignments and alternative minerals having similar peak assignments. Refractive indices for 15 minerals as determined by polarized light microscopy are listed. A list of minerals and standards used in the study is presented. Calibration curves determined during step scanning are also included for quartz (14808607), chrysotile (12001295), tremolite (14567738) and anthrophyllite as found in the talc samples.
Keywords
NIOSH-Contract; Contract-210-75-0063; Chemical-analysis; Chemical-structure; Structural-analysis; Inorganic-compounds; Industrial-chemicals; Chemical-extraction
CAS No.
14807-96-6; 14808-60-7; 12001-29-5; 14567-73-8
Publication Date
19770501
Document Type
Final Contract Report
Funding Type
Contract
Fiscal Year
1977
NTIS Accession No.
PB84-190651
NTIS Price
A05
Identifying No.
Contract-210-75-0063
Source Name
National Institute for Occupational Safety and Health
State
OH; IL
Performing Organization
MCCrone (Walter C.) Associates, Inc., Chicago, Illinois
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