# Prediction of new sp3 silicon and germanium allotropes from the topology-based multiscale method

## TL;DR

This paper predicts six new silicon and germanium sp3 allotropes based on topology-inspired methods, analyzing their structural and physical properties to expand the understanding of these materials.

## Contribution

It introduces a topology-based multiscale approach to predict new silicon and germanium allotropes with specific symmetries and properties, extending previous carbon allotrope studies.

## Key findings

- Six new silicon allotropes predicted
- Six new germanium allotropes predicted
- Detailed analysis of their properties conducted

## Abstract

This article continues our recent publication [I.A. Baburin and D.M. Proserpio and V.A. Saleev and A.V. Shipilova, Phys. Chem. Chem. Phys.17, 1332 (2015)] where we have presented a comprehensive computational study of sp3 carbon allotropes based on the topologies proposed for zeolites. Here we predict six new silicon and six new germanium allotropes which have the same space group symmetries and topologies as those predicted earlier for the carbon allotropes, and study their structural, elastic, vibrational, electronic and optical properties.