Simple Hexagonal (HgSn$_{6-10}$ $A_{f}$) Structure: A_hP1_191_a-001
| Prototype | HgSn$_{6-10}$ |
| AFLOW prototype label | A_hP1_191_a-001 |
| Strukturbericht designation | $A_{f}$ |
| ICSD | 639211 |
| Pearson symbol | hP1 |
| Space group number | 191 |
| Space group symbol | $P6/mmm$ |
| AFLOW prototype command |
aflow --proto=A_hP1_191_a-001
--params=$a, \allowbreak c/a$ |
Other compounds with this structure
Si (metastable), disordered phases of BiIn, CdSn$_{19}$, In$_{7}$Sb$_{3}$, InSb
- Unlike the simple cubic lattice, there are no elements which take this structure as the ground state. There is a metastable silicon phase with this structure. The prototype state is a mercury-tin alloy. Thus the atom type
M
represents an average of Hg and Sn atoms.
\[ \begin{array}{ccc}
\mathbf{a_{1}}&=&\frac{1}{2}a \,\mathbf{\hat{x}}- \frac{\sqrt{3}}{2}a \,\mathbf{\hat{y}}\\\mathbf{a_{2}}&=&\frac{1}{2}a \,\mathbf{\hat{x}}+\frac{\sqrt{3}}{2}a \,\mathbf{\hat{y}}\\\mathbf{a_{3}}&=&c \,\mathbf{\hat{z}}
\end{array}\]
Basis vectors
| Lattice coordinates | Cartesian coordinates | Wyckoff position | Atom type | |||
|---|---|---|---|---|---|---|
| $\mathbf{B_{1}}$ | = | $0$ | = | $0$ | (1a) | Sn I |
References
- G. V. Raynor and J. A. Lee, The tin-rich intermediate phases in the alloys of tin with cadmium, indium and mercury, Acta Metall. 2, 616–620 (1954), doi:10.1016/0001-6160(54)90197-2.
Found in
- P. Villars and L. Calvert, Pearson's Handbook of Crystallographic Data for Intermetallic Phases (ASM International, Materials Park, OH, 1991), 2nd edn.
Prototype Generator
aflow --proto=A_hP1_191_a --params=$a,c/a$