GeP (High–pressure, superconducting) Structure: AB_tI4_107_a_a

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Prototype : GeP
AFLOW prototype label : AB_tI4_107_a_a
Strukturbericht designation : None
Pearson symbol : tI4
Space group number : 107
Space group symbol : $I4mm$
AFLOW prototype command : aflow --proto=AB_tI4_107_a_a
--params=
$a$,$c/a$,$z_{1}$,$z_{2}$


Body-centered Tetragonal primitive vectors:

\[ \begin{array}{ccc} \mathbf{a}_1 & = & - \frac12 \, a \, \mathbf{\hat{x}} + \frac12 \, a \, \mathbf{\hat{y}} + \frac12 \, c \, \mathbf{\hat{z}} \\ \mathbf{a}_2 & = & ~ \frac12 \, a \, \mathbf{\hat{x}} - \frac12 \, a \, \mathbf{\hat{y}} + \frac12 \, c \, \mathbf{\hat{z}} \\ \mathbf{a}_3 & = & ~ \frac12 \, a \, \mathbf{\hat{x}} + \frac12 \, a \, \mathbf{\hat{y}} - \frac12 \, c \, \mathbf{\hat{z}} \\ \end{array} \]

Basis vectors:

\[ \begin{array}{ccccccc} & & \mbox{Lattice Coordinates} & & \mbox{Cartesian Coordinates} &\mbox{Wyckoff Position} & \mbox{Atom Type} \\ \mathbf{B}_{1} & = & z_{1} \, \mathbf{a}_{1} + z_{1} \, \mathbf{a}_{2} & = & z_{1}c \, \mathbf{\hat{z}} & \left(2a\right) & \mbox{Ge} \\ \mathbf{B}_{2} & = & z_{2} \, \mathbf{a}_{1} + z_{2} \, \mathbf{a}_{2} & = & z_{2}c \, \mathbf{\hat{z}} & \left(2a\right) & \mbox{P} \\ \end{array} \]

References

  • P. C. Donohue and H. S. Young, Synthesis, structure, and superconductivity of new high pressure phases in the systems Ge–P and Ge–As, J. Solid State Chem. 1, 143–149 (1970), doi:10.1016/0022-4596(70)90005-8.

Found in

  • P. Villars and K. Cenzual, Pearson's Crystal Data – Crystal Structure Database for Inorganic Compounds, ASM International (2013).

Geometry files


Prototype Generator

aflow --proto=AB_tI4_107_a_a --params=

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