Material Specification for Hg:121; [Hg-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite S.N. Putilin et al., Nature (London), Vol. 362, 226 (1993). No additional processing details were noted.
Formula: HgBa2CuO4+x
Informal Name: Hg:121
Chemical Family: Hg-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Hg:121; [Hg-Ba-Cu-O]
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| Crystal System: | Tetragonal |
| Formula Units per Cell: | |
| Space Group: |
P4/mmm
|
Cell Parameters
| Occupancy () |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| -- |
296 |
3.8829(6) |
-- |
9.5129(14) |
Atomic Coordinates
| Occupancy () |
Atom |
Temp
K
|
a-axis |
b-axis |
c-axis |
| 1 |
Hg |
296 |
0 |
0 |
0 |
| 1 |
Ba |
296 |
0.5 |
0.5 |
0.2988(6) |
| 1 |
Cu |
296 |
0 |
0 |
0.5 |
| 1 |
O(1) |
296 |
0 |
0.5 |
0.5 |
| 1 |
O(2) |
296 |
0 |
0 |
0.2073(5) |
| 0.063(14) |
O(3) |
296 |
0.5 |
0.5 |
0 |
Measurement Method: Neutron diffraction
"Neutron diffraction intensity data were collected at room temperature with a single counter powder diffractometer at the Reactor of the National Institute of Standards and Technology... The observed intensities were corrected for absorption using the absorption correction factors for cylinders given in the International Tables and the value of µR determined experimentally...
Monochromatic beam: 220 reflection of Cu monochromator
Wavelength: 1.540(1) σ
Sample container: Al can of about 7 mm diameter
2θ angular range: 5°-115°, steps: 0.05°
... The Rietveld refinement of this mixture of three phases was carried out with the multiphase program GSAS..."
Cautions: Evaluated Data
Critical Temperature for Hg:121; [Hg-Ba-Cu-O]
| Critical Temperature (K) |
| 94 |
Measurement Method: Ac susceptibility
The authors cite S.N. Putilin et al., Nature(London), Vol. 362, 226 (1993). No additional measurement details were noted.
Cautions: Unevaluated Data
