Ceramics in COVID-19: Analysis of some Structural Properties

The biocompatibility of inorganic-organic hybrid ceramics is quite significant in materials science and to study the role of ceramic materials in Covid-19 pandemic, a series of ceramic materials have been selected to analyse their structural properties from XRD data and spectroscopic prediction. The Crystallographic Information File (CIF) data obtained from International Union of Crystallography (IUCr) depicts that all the ten ceramic materials exist in four crystal systems i.e. monoclinic, orthorhombic, tetragonal and trigonal. The ceramic materials, C1 [Na₄Ni₇(AsO₄)₆] and C4 [2C₇H₈N₄OH₂O] exist in monoclinic space group C 2/m and C 2/c, C2 [Nd₃BSi₂O₁₀], C3 [Sr(ClO₄)₂] and C5[Ca(ClO₄)₂] exist in P_bca, C10 [Ba(ClO₄)₂] in F_ddd, C6 [Ca_0.84Sr_0.16MoO₄] in I4₁/a and three ceramic materials, C7 [Cd₃Ge₂As₄], C8 [SrGa₄As₄] and C9 [Cd₃TeO₆] exist in R-3, P3₂21 and R-3:H, respectively. The spectral active modes of IR and Raman spectra tensors were calculated which shows that Raman-active modes for orthorhombic C2 [Nd₃BSi₂O₁₀], C3 [Sr(ClO₄)₂] and C5[Ca(ClO₄)₂] (Pbca) were (Γ_acoustic = B_1u + B_2u + B_3u), (Γ_acoustic = B_1u + B_2u + B_3u) and (Γ_acoustic = B_1u + B_2u + B_3u), respectively while C10 [Ba(ClO₄)₂] (F_ddd) were (Γ_acoustic = B_1u + B_2u + B_3u). Raman-active modes for trigonal C7 [Cd₃Ge₂As₄], C8 [SrGa₄As₄] and C9 [Cd₃TeO₆] (R-3) were (Γ_acoustic= A + ¹E + ²E), (P3₂21) were (Γ_acoustic= A₂ + E) and (R-3:H) were (Γ_acoustic = A + ¹E + ²E). The Raman-active modes for monoclinic C1 [Na₄Ni₇(AsO₄)₆] and C4 [2C₇H₈N₄OH₂O] (C 2/m) were (Γ_acoustic = A_u+2B_u) and (C 2/c) were (Γ_acoustic = A_u+2B_u) respectively while C6 [Ca_0.84Sr_0.16MoO₄] (I₄₁/a) were (Γ_acoustic = A_u + ¹E_u + ²E_u).