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Title: Iron
Description: When calcium atoms (yellow spheres) in these iron-based crystals (left) are replaced on some occasions with praseodymium (blue sphere in right image), the crystals are able to superconduct at up to 47K - but the crystals can also collapse, shrinking by about 10 percent in size. Adding a sufficient amount of praseodymium is necessary to avoid the collapse, which compromises the materials usability in electronics applications.

*NCNR

See also http://www.nist.gov/ncnr/iron-020712.cfm.
Subjects (names):
Topics/Categories:
Type: Graphic/scientific data
Source: National Institute of Standards and Technology
Credit Line as it should
appear in print:
Credit: NIST
AV Number: 12NCNR001
Date Created: 2012
Date Entered: 2/7/2012

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