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STS073-337-021
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STS073-337-021

June 1, 2011
Three members of the crew check out the Zeolite Crystal Growth (ZCG) on the mid deck of the Earth-orbiting Space Shuttle Columbia. Left to right are astronauts Kenneth D. Bowersox and Kent V. Rominger, mission commander and pilot, respectively, and payload specialist Albert Sacco Jr. ZCG evaluated Zeolite crystallization and growth in the microgravity environment aboard Columbia in order to achieve high yields of large, nearly perfect crystals in space. Zeolites are complex arrangements of silica and alumina that occur naturally as well as synthetically.