Hollandite-type materials are structurally versatile ceramics used in nuclear waste immobilization, ion transport, and energy storage, yet quantitative and physically interpretable composition-to-structure prediction remains limited. In this work, we develop a suite of interpretable multivariate regression models, benchmarked against machine learning approaches, to predict key crystallographic features of hollandite materials, including lattice constants a and c, tunnel bottleneck size (d-d), and crystallographic symmetry. Using physically motivated descriptors such as ionic-radius mismatch, oxidation states, electronegativity, and tunnel occupancy, we reveal a pronounced directional anisotropy in composition-structure relationships. Lattice constant a is accurately captured by a multivariate linear regression (MLR) model dominated by steric mismatch effects, whereas lattice constant c and d-d require compact multivariate polynomial regression (MPR) models to describe essential nonlinear and interaction effects arising from coupled steric and electronic contributions. A regression-based symmetry model further enables reliable classification of tetragonal and monoclinic phases using physically interpretable descriptors alone. Benchmarking against artificial neural networks (ANN) and support vector regression (SVG) confirms that the interpretable regression models achieve comparable accuracy while offering direct mechanistic insight. The validated regression models are subsequently applied to predict structural features of previously uncharacterized hollandite compositions, including actinide-substituted titanates and Mn- and Sn-based analogues. Overall, this work establishes a data-efficient, mechanism-aware framework for composition-driven structure prediction in tunnel-structured oxides, providing a transferable strategy for accelerated materials design.
扫码关注我们
求助内容:
应助结果提醒方式:
