Negative Thermal Expansion of Mercurous Halides

  • Priyanthi M. AmarasingheEmail author
  • Joo-Soo Kim
  • Sudhir Trivedi
  • Syed B. Qadri
  • Edward P. Gorzkowski
  • Greg Imler
  • Jolanta Soos
  • Neelam Gupta
  • James Jensen


Thermal expansions of single crystals of mercurous halides grown by the physical vapor transport method have been investigated. The unit cell lattice parameters were measured by using x-ray diffraction, whereas, the bulk thermal expansion was investigated using the dilatometer instrument as a function of temperature. It was found by both techniques that mercurous halides exhibit positive linear thermal expansion along the a-axis and negative linear thermal expansion along the c-axis. However, the volume expansion in both methods was found to be positive. The coefficient of thermal expansion along the a-axis was significantly larger than the one along the c-axis giving a net positive volume expansion.


Thermal expansion NTE (negative thermal expansion) mercurous halides XRD 


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This research has been supported by the US Army Chemical Biological Defense contract no. W911SR-14-C-0065 and US Army Research Laboratory contract nos. W911QX-06-C-0074 and W911QX-06-C-0074-P0006.


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© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Priyanthi M. Amarasinghe
    • 1
    Email author
  • Joo-Soo Kim
    • 1
  • Sudhir Trivedi
    • 1
  • Syed B. Qadri
    • 2
  • Edward P. Gorzkowski
    • 2
  • Greg Imler
    • 2
  • Jolanta Soos
    • 1
  • Neelam Gupta
    • 3
  • James Jensen
    • 4
  1. 1.Brimrose Technology CorporationSparksUSA
  2. 2.U.S. Naval Research LaboratoryWashingtonUSA
  3. 3.U.S. Army Research LaboratoryAdelphiUSA
  4. 4.U.S. Army Edgewood Chemical Biological CenterEdgewoodUSA

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