Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: Quartz

Skip navigational links
Dictionaries: Our Mapping Systems   The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats  
InfoBank Terms: Activity ID   activity overview   crew   digital data   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   biological   geochemical   gravity   ground penetrating radar   imaging   LIDAR   logs   magnetics   metering equipment   navigation   samples   seismic   total station   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
Comment: 08:34 - 09:20 (00:46)
Source: Annenberg/CPB Resources - Earth Revealed - 12. Minerals: The Materials of Earth
Keywords: "Richard Hazlett", mineral, quartz, silicon, oxygen, solid, gas, hardness, "three-dimensional bonding", ion, transparent, crystal, element

Our transcription: Another mineral with physical properties that are different from those of its chemical proponents is quartz.
If you look at the mineral quartz, it's composed of silicon, which in its pure state is a silvery solid substance, and oxygen, which isn't a solid at all, but an important atmospheric gas, that also behaves flammably.
Silicon and oxygen are very different individually.
They don't combine to form quartz under ordinary surface conditions, but inside the Earth quartz forming reactions are common.
Quartz is harder than steel due to the three-dimensional bonding of its individual silicon and oxygen ions.
It's usually transparent, forms beautiful crystals, very different from its pure separated elements.

Geology School Keywords
Skip footer navigational links

Coastal and Marine Science Centers:  Pacific   St. Petersburg   Woods Hole  
InfoBank   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:26:26 PDT 2013  (chd)