# \#siesta

**URL:** https://community.materialssquare.com/tag/siesta/29.md

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## [Q. What version of SIESTA is available for use in MatSQ?](https://community.materialssquare.com/t/q-what-version-of-siesta-is-available-for-use-in-matsq/378)

<div class="topic-metadata">

**Author:** [@jihee.y](https://community.materialssquare.com/u/jihee.y)\
**Replies:** 0\
**Last updated:** [June 7, 2024, 6:56am UTC](https://community.materialssquare.com/t/q-what-version-of-siesta-is-available-for-use-in-matsq/378 "2024-06-07T06:56:26Z")

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A. Versions 4.1.5 is available.

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## [Q. What calculations can be performed with SIESTA?](https://community.materialssquare.com/t/q-what-calculations-can-be-performed-with-siesta/377)

<div class="topic-metadata">

**Author:** [@jihee.y](https://community.materialssquare.com/u/jihee.y)\
**Replies:** 0\
**Last updated:** [June 7, 2024, 6:45am UTC](https://community.materialssquare.com/t/q-what-calculations-can-be-performed-with-siesta/377 "2024-06-07T06:45:19Z")

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A. With SIESTA, you can perform the following calculations. Energy Calculations: Compute ground state energy, total energy, and free energy of materials. Structural Optimization: Optimize atomic positions to find the m…

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## [Q. What is SIESTA?](https://community.materialssquare.com/t/q-what-is-siesta/376)

<div class="topic-metadata">

**Author:** [@jihee.y](https://community.materialssquare.com/u/jihee.y)\
**Replies:** 0\
**Last updated:** [June 7, 2024, 6:41am UTC](https://community.materialssquare.com/t/q-what-is-siesta/376 "2024-06-07T06:41:14Z")

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A. SIESTA (Spanish Initiative for Electronic Simulations with Thousands of Atoms) is an open-source software package designed for the simulation of the electronic structure and properties of molecules and materials. It i…