C2CeNi Structure: A2BC_oC8_38_e_a_b
| Prototype | : | C2CeNi |
| AFLOW prototype label | : | A2BC_oC8_38_e_a_b |
| Strukturbericht designation | : | None |
| Pearson symbol | : | oC8 |
| Space group number | : | 38 |
| Space group symbol | : | $\mbox{Amm2}$ |
| AFLOW prototype command | : | aflow --proto=A2BC_oC8_38_e_a_b --params=$a,b/a,c/a,z_{1},z_{2},y_{3},z_{3}$ |
Other compounds with this structure
- C2CoDy, C2ErFe, C2FeSm, C2NiPa, C2NiYb, C2PrRh, many other C2XY
Base-centered Orthorhombic primitive vectors:
\[
\begin{array}{ccc}
\mathbf{a}_1 & = & a \, \mathbf{\hat{x}} \\
\mathbf{a}_2 & = & \frac12 \, b \, \mathbf{\hat{y}} - \frac12 \, c \, \mathbf{\hat{z}} \\
\mathbf{a}_3 & = & \frac12 \, b \, \mathbf{\hat{y}} + \frac12 \, c \, \mathbf{\hat{z}}
\end{array}
\]
Basis vectors:
\[ \begin{array}{ccccccc} & & \mbox{Lattice Coordinates} & & \mbox{Cartesian Coordinates} &\mbox{Wyckoff Position} & \mbox{Atom Type} \\ \mathbf{B}_{1} & =& - z_{1} \, \mathbf{a}_{2} + z_{1} \, \mathbf{a}_{3}& =& z_{1} \, c \, \mathbf{\hat{z}}& \left(2a\right) & \mbox{Ce} \\ \mathbf{B}_{2} & =& \frac12 \, \mathbf{a}_{1} - z_{2} \, \mathbf{a}_{2} + z_{2} \, \mathbf{a}_{3}& =& \frac12 \, a \, \mathbf{\hat{x}} + z_{2} \, c \, \mathbf{\hat{z}}& \left(2b\right) & \mbox{Ni} \\ \mathbf{B}_{3} & =& \frac12 \, \mathbf{a}_{1} + \left(y_{3} - z_{3}\right) \, \mathbf{a}_{2} + \left(y_{3} + z_{3}\right) \, \mathbf{a}_{3}& =& \frac12 \, a \, \mathbf{\hat{x}} + y_{3} \, b \, \mathbf{\hat{y}} + z_{3} \, c \, \mathbf{\hat{z}}& \left(4e\right) & \mbox{C} \\ \mathbf{B}_{4} & =& \frac12 \, \mathbf{a}_{1} - \left(y_{3} + z_{3}\right) \, \mathbf{a}_{2} + \left(z_{3} - y_{3}\right) \, \mathbf{a}_{3}& =& \frac12 \, a \, \mathbf{\hat{x}} - y_{3} \, b \, \mathbf{\hat{y}} + z_{3} \, c \, \mathbf{\hat{z}}& \left(4e\right) & \mbox{C} \\ \end{array} \]References
- O. Y. Bodak and J. P. Marusin, The Crystal Structure of RNiC2 Compounds (R=Ce,La,Pr), Dopovidi Akademii Nauk Ukrains'koj RSR Seriya A, Fiziko–Tekhnichni ta Matematichni Nauki 12, 1048–1050 (1979).
Found in
- P. Villars and L. Calvert, Pearson's Handbook of Crystallographic Data for Intermetallic Phases (ASM International, Materials Park, OH, 1991), 2nd edn., pp. 1858-1859.