NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Results of the TTF-TCNQ and the calcium carbonate crystallization on the Long Duration Exposure FacilityExperiment A0139A on the Long Duration Exposure Facility (LDEF) carried four large containers into orbit five years with crystal growth solutions for lead sulfide, calcium carbonate, and TTF-TCNQ. Although temperature data was lost, the experimental program had been working since the valves in all containers had been opened. All four experiments produced crystals of varying quality. The calcium carbonate crystals had the best appearance. The TTF-TCNQ crystals were packed together near the valve openings of the container. When taken apart, the single crystals showed some unusual morphological properties. X ray investigations as well as conductivity measurements on long duration space grown TTF-TCNQ crystals will be presented. Comparisons will be made with our previous space solution growth experiments. The TTF-TCNQ crystals are no longer of the highest interest, so this activity has been terminated in favor of calcium carbonate and calcium phosphate crystallizations.
Document ID
19920017884
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nielsen, Kjeld Flemming
(Institute of Aviation Medicine Manching (Germany, F.R.)., United States)
Lind, M. David
(Rockwell International Science Center Thousand Oaks, CA., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Publication Information
Publication: NASA. Langley Research Center, LDEF: 69 Months in Space. First Post-Retrieval Symposium, Part 3
Subject Category
Solid-State Physics
Accession Number
92N27127
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available