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Relationship of Mineral Habit to Size Characteristics for Tremolite Cleavage Fragments and Fibers.

Authors
Campbell-WJ; Steel-EB; Virta-RL; Eisner-MH
Source
NTIS: PB 300 364 :18 pages
Link
NIOSHTIC No.
10007953
Abstract
This Bureau of Mines report describes a study conducted to determine the relationship of mineral habit to particle size and shape characteristics for prismatic, acicular, fibrous, and asbestiform varieties of tremolite. Particle measurements were made with the petrographic microscope at x 1,250 and the scanning electron microscope at magnifications up to x 10,000. All of the varieties of tremolite, upon wiley milling, produced a significant percentage of particles that meet the federal regulatory criteria for counting as asbestos fibers. However, only the asbestiform variety gave milled particles that fell into a size range of >10 um in length and <0.5 Um in width; some medical scientists consider this range significant for production of adverse health effects.
Publication Date
19790101
Document Type
IH; Report of Investigation;
Fiscal Year
1979
NTIS Accession No.
PB-300364
NTIS Price
A03
Identifying No.
RI 8367
NIOSH Division
AVRC;
Source Name
NTIS: PB 300 364
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division