U.S. Department of Labor
	Occupational Safety & Health Administration
	www.osha.gov		[skip navigational links]	Search	Advanced Search | A-Z Index

Safety and Health Topics > Multimedia > Quartz Slide Presentation > Analysis of Mt. St. Helens Dust

Analysis of Mt. St. Helens Dust   24 of 72   Next   Back   Menu   Index   A diffraction pattern output of a sample taken after the Mt. St. Helen’s eruption. Note the three different diffraction angles used for quartz and one for cristobalite. The tertiary angle (TERT QTZ) for quartz also shows how an interfernece can be compensated for by stripping out an interefering substance (first peak) and integrating only the shaded area (quartz peak). This sample contains approximately 3% quartz and 6% cristobalite.

Back to Top www.osha.gov		www.dol.gov
Contact Us | Freedom of Information Act | Customer Survey Privacy and Security Statement | Disclaimers
Occupational Safety & Health Administration 200 Constitution Avenue, NW Washington, DC 20210