Materials id 691 / SnSe / Pnma (62)
==============================================================================

- Date page updated: 2018-4-17
- Space group type: Pnma (62) / -P 2ac 2n
- Number of formula units (Z): 4
- Phonon raw data: :download:`mp-691-20180417.tar.lzma <./mp-691-20180417.tar.lzma>`
- Link to Materials Project: `https://www.materialsproject.org/materials/mp-691/ <https://www.materialsproject.org/materials/mp-691/>`_

Phonon band structure
----------------------

.. image:: mp-691-band.png

Phonon DOS
-----------

.. image:: mp-691-dos.png

Thermal properties at constant volume
--------------------------------------

Imaginary modes are excluded if they exist.

.. image:: mp-691-tprops.png

POSCAR.yaml
----------------

POSCAR.yaml shows the crystal structure after the relaxation used for this phonon calculation.

::

   lattice:
   - [    11.4378866699999993,     0.0000000000000000,     0.0000000000000000 ] # a
   - [     0.0000000000000000,     4.1475032699999996,     0.0000000000000000 ] # b
   - [     0.0000000000000000,     0.0000000000000000,     4.3488168700000003 ] # c
   points:
   - symbol: Se # 1
     coordinates: [  0.3566621300000000,  0.7500000000000000,  0.0210452700000000 ]
     mass: 78.960000
   - symbol: Se # 2
     coordinates: [  0.6433378700000000,  0.2500000000000000,  0.9789547300000000 ]
     mass: 78.960000
   - symbol: Se # 3
     coordinates: [  0.1433378700000000,  0.2500000000000000,  0.5210452700000000 ]
     mass: 78.960000
   - symbol: Se # 4
     coordinates: [  0.8566621300000000,  0.7500000000000000,  0.4789547300000000 ]
     mass: 78.960000
   - symbol: Sn # 5
     coordinates: [  0.6175194800000000,  0.7500000000000000,  0.4072883000000000 ]
     mass: 118.710000
   - symbol: Sn # 6
     coordinates: [  0.3824805200000000,  0.2500000000000000,  0.5927117000000000 ]
     mass: 118.710000
   - symbol: Sn # 7
     coordinates: [  0.8824805200000000,  0.2500000000000000,  0.9072883000000000 ]
     mass: 118.710000
   - symbol: Sn # 8
     coordinates: [  0.1175194800000000,  0.7500000000000000,  0.0927117000000000 ]
     mass: 118.710000
   poscar_order:
   - 1
   - 2
   - 3
   - 4
   - 5
   - 6
   - 7
   - 8

Citation
-----------

.. _the Materials Project: https://www.materialsproject.org/
.. _the Materials Project citation: https://materialsproject.org/citing
.. _SeeK-path: http://materialscloud.org/tools/seekpath

..

The initial crystal structure used to perform phonon calculation is
obtained from `the Materials Project`_. The phonon band structure
paths are determined using `SeeK-path`_. More details about how to
obtain the crystal structure, how to determine the band structure
paths, and those citations are found at
:ref:`crystal_structure_and_citation`.

License
--------------

The contents of this web page are licensed under a `Creative Commons
4.0 Attribution International License
<http://creativecommons.org/licenses/by/4.0/>`_.

.. image :: https://i.creativecommons.org/l/by/4.0/88x31.png
   :target: http://creativecommons.org/licenses/by/4.0/
   :alt: license