Himalayan Physics https://nepjol.info/index.php/HP <p style="font-weight: 400;"><em>Himalayan Physics (HimPhys)</em> is a distinguished, open-access, peer-reviewed journal dedicated to publishing high-quality articles that make innovative contributions to various fields of physics. It is published annually by the Nepal Physical Society (Gandaki Chapter) and the esteemed Department of Physics at Prithvi Narayan Campus in Pokhara. The primary objective of HimPhys is to provide a platform that unites researchers and practitioners from both domestic and international academic communities, fostering a focused exchange on advanced techniques and the exploration of new frontiers within the physical sciences. By facilitating collaboration and knowledge-sharing, HimPhys aims to establish strong connections with the vibrant physics community in Nepal.</p> Department of Physics, Prithvi Narayan Campus en-US Himalayan Physics 2542-2545 Lattice parameters prediction of orthorhombic oxyhalides using machine learning https://nepjol.info/index.php/HP/article/view/62178 <p>Lattice parameters of orthorhombic oxyhalides with molecular formula AOX are predicted using KRR, LR, and GBR machine learning (ML) models. Seventeen data of orthorhombic oxyhalides are extracted from the Materials Project Database, and several features such as atomic radius, ionic radius, band gap, density, electro-negativity, and atomic mass are taken into account. After refining the data, they are used for ML training and testing processes. The actual values of the respective compounds' lattice parameters are compared with those predicted by different models. Then, the accuracy of their predictions is checked by calculating MAE, MSE, and R<sup>2</sup>. The GBR model is more efficient in predicting lattice parameters 'b' and 'c', whereas KRR is found to be more more efficient in predicting 'a'. Further, using the random forest regression model, the features importance plot is also observed to understand which features play an important role in predicting the lattice parameters.</p> Poojan Koirala Madhav Ghimire Copyright (c) 2024 Himalayan Physics 2024-01-24 2024-01-24 11 10.3126/hp.v11i1.62178