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Crystalline Silica Overview: Occurrence and Analysis.

PB92200997

Publication Date	1992
Personal Author	Ampian, S. G.; Virta, R. L.
Page Count	36
Abstract	Crystalline silica (quartz, cristobalite, and tridymite) is regulated by the Mine Safety and Health Administration (MSHA) and Occupational Safety and Health Administration (OSHA) because of their potential for causing debilitating but nonmalignant lung diseases. The paper will discuss the definition of crystalline silica, its occurrences, and the types of mining operations that may be affected by the regulation of crystalline silica. It also will highlight some of the difficulties associated with the present methods for determining the crystalline silica content in samples and provide recommendations that may avoid some of these shortcomings. The problems with the availability of quartz and cristobalite standards and the use of one standard for materials possessing a wide range of crystallinities and particle sizes are discussed.
Keywords	Quartz Silicon dioxide Mining Occupational safety and health X ray diffraction Standards Carcinogens Health hazards Spectrum analysis Silica minerals US OSHA Regulations Chemical analysis
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99A - Analytical Chemistry 57U - Public Health & Industrial Medicine
Corporate Authors	Bureau of Mines, Washington, DC.
Supplemental Notes	Library of Congress catalog card no. 92-700.
Document Type	Technical Report
Title Note	Information circular/1992.
NTIS Issue Number	199220

Crystalline Silica Overview: Occurrence and Analysis.

Crystalline Silica Overview: Occurrence and Analysis.
PB92200997

Publication Date	1992
Personal Author	Ampian, S. G.; Virta, R. L.
Page Count	36
Abstract	Crystalline silica (quartz, cristobalite, and tridymite) is regulated by the Mine Safety and Health Administration (MSHA) and Occupational Safety and Health Administration (OSHA) because of their potential for causing debilitating but nonmalignant lung diseases. The paper will discuss the definition of crystalline silica, its occurrences, and the types of mining operations that may be affected by the regulation of crystalline silica. It also will highlight some of the difficulties associated with the present methods for determining the crystalline silica content in samples and provide recommendations that may avoid some of these shortcomings. The problems with the availability of quartz and cristobalite standards and the use of one standard for materials possessing a wide range of crystallinities and particle sizes are discussed.
Keywords	Quartz Silicon dioxide Mining Occupational safety and health X ray diffraction Standards Carcinogens Health hazards Spectrum analysis Silica minerals US OSHA Regulations Chemical analysis
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99A - Analytical Chemistry 57U - Public Health & Industrial Medicine
Corporate Authors	Bureau of Mines, Washington, DC.
Supplemental Notes	Library of Congress catalog card no. 92-700.
Document Type	Technical Report
Title Note	Information circular/1992.
NTIS Issue Number	199220