$E6_{1}$ (Sr(OH)2(H2O)8) (obsolete) Structure : A8B2C_tP11_123_r_f_a

Picture of Structure; Click for Big Picture
Prototype : Sr(OH)2(H2O)8
AFLOW prototype label : A8B2C_tP11_123_r_f_a
Strukturbericht designation : $E6_{1}$
Pearson symbol : tP11
Space group number : 123
Space group symbol : $P4/mmm$
AFLOW prototype command : aflow --proto=A8B2C_tP11_123_r_f_a
--params=
$a$,$c/a$,$x_{3}$,$z_{3}$



Simple Tetragonal primitive vectors:

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

Basis vectors:

\[ \begin{array}{ccccccc} & & \mbox{Lattice Coordinates} & & \mbox{Cartesian Coordinates} &\mbox{Wyckoff Position} & \mbox{Atom Type} \\ \mathbf{B}_{1} & = & 0 \, \mathbf{a}_{1} + 0 \, \mathbf{a}_{2} + 0 \, \mathbf{a}_{3} & = & 0 \, \mathbf{\hat{x}} + 0 \, \mathbf{\hat{y}} + 0 \, \mathbf{\hat{z}} & \left(1a\right) & \mbox{Sr} \\ \mathbf{B}_{2} & = & \frac{1}{2} \, \mathbf{a}_{2} & = & \frac{1}{2}a \, \mathbf{\hat{y}} & \left(2f\right) & \mbox{OH} \\ \mathbf{B}_{3} & = & \frac{1}{2} \, \mathbf{a}_{1} & = & \frac{1}{2}a \, \mathbf{\hat{x}} & \left(2f\right) & \mbox{OH} \\ \mathbf{B}_{4} & = & x_{3} \, \mathbf{a}_{1} + x_{3} \, \mathbf{a}_{2} + z_{3} \, \mathbf{a}_{3} & = & x_{3}a \, \mathbf{\hat{x}} + x_{3}a \, \mathbf{\hat{y}} + z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{5} & = & -x_{3} \, \mathbf{a}_{1}-x_{3} \, \mathbf{a}_{2} + z_{3} \, \mathbf{a}_{3} & = & -x_{3}a \, \mathbf{\hat{x}}-x_{3}a \, \mathbf{\hat{y}} + z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{6} & = & -x_{3} \, \mathbf{a}_{1} + x_{3} \, \mathbf{a}_{2} + z_{3} \, \mathbf{a}_{3} & = & -x_{3}a \, \mathbf{\hat{x}} + x_{3}a \, \mathbf{\hat{y}} + z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{7} & = & x_{3} \, \mathbf{a}_{1}-x_{3} \, \mathbf{a}_{2} + z_{3} \, \mathbf{a}_{3} & = & x_{3}a \, \mathbf{\hat{x}}-x_{3}a \, \mathbf{\hat{y}} + z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{8} & = & -x_{3} \, \mathbf{a}_{1} + x_{3} \, \mathbf{a}_{2}-z_{3} \, \mathbf{a}_{3} & = & -x_{3}a \, \mathbf{\hat{x}} + x_{3}a \, \mathbf{\hat{y}}-z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{9} & = & x_{3} \, \mathbf{a}_{1}-x_{3} \, \mathbf{a}_{2}-z_{3} \, \mathbf{a}_{3} & = & x_{3}a \, \mathbf{\hat{x}}-x_{3}a \, \mathbf{\hat{y}}-z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{10} & = & x_{3} \, \mathbf{a}_{1} + x_{3} \, \mathbf{a}_{2}-z_{3} \, \mathbf{a}_{3} & = & x_{3}a \, \mathbf{\hat{x}} + x_{3}a \, \mathbf{\hat{y}}-z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \mathbf{B}_{11} & = & -x_{3} \, \mathbf{a}_{1}-x_{3} \, \mathbf{a}_{2}-z_{3} \, \mathbf{a}_{3} & = & -x_{3}a \, \mathbf{\hat{x}}-x_{3}a \, \mathbf{\hat{y}}-z_{3}c \, \mathbf{\hat{z}} & \left(8r\right) & \mbox{H$_{2}$O} \\ \end{array} \]

References

  • G. Natta, Constitution of hydroxides and of hydrates. III. Octahydrated strontium hydroxide, Gazz. Chim. Ital. 58, 870–872 (1928).

Found in

  • C. Hermann, O. Lohrmann, and H. Philipp, eds., Strukturbericht Band II 1928–1932 (Akademische Verlagsgesellschaft M. B. H., Leipzig, 1937).
  • J. S. Ricci, R. C. Stevens, R. K. McMullan, and W. T. Klooster, Structure of strontium hydroxide octahydrate, Sr(OH)2 · $8H2O, at 20, 100 and 200 K from neutron diffraction, Acta Crystallogr. Sect. B Struct. Sci. 61, 381–386 (2005), doi:10.1107/S0108768105013480.

Geometry files


Prototype Generator

aflow --proto=A8B2C_tP11_123_r_f_a --params=

Species:

Running:

Output: