Mn_1−xMg_xW_1−xTiₓO₄ samples (x = 0.0, 0.05, 0.1) were generated using the co-precipitation process and the formed phase identification for the obtained samples was achieved via the program X’Pert HighScore Plus. Utilizing Rietveld refinement, the cell parameters enlarged non-monotonically upon doping with magnesium (Mg) and titanium (Ti), while the crystallite Size reduced along the basal directions [0k0] and [00l] with a slight increase along the direction [h00]. Also, doping led to distortion in both manganese (Mn) and tungstate (W) octahedra as detected by Rietveld analysis and confirmed via Raman spectroscopy analysis. The optical bandgap energy was reduced non-monotonically with Mg/Ti doping value; for x = 0.05 it decreased from 2.82 to 2.67 eV, while for x = 0.1 it reduced to 2.72 eV. The photoluminescence intensity is reduced but with a lager value for doping with x = 0.05 than for 0.1. Radiation shielding analysis revealed a decreasing linear attenuation coefficient (LAC) from 675.63 to 623.40 cm⁻¹ at 15 keV and from 0.302 to 0.282 cm⁻¹ at 15 MeV. The mass attenuation coefficient (MAC) decreased from 93.84 to 92.35 cm²/g at 15 keV. The half-value layer (HVL) increased with doping: from 0.822 to 0.901 cm at 0.5 MeV and from 2.292 to 2.456 cm at 15 MeV. The mean free path (MFP) reached maximum values of 3.825, 3.986, and 4.110 cm at 5 MeV for x = 0, 0.05, and 0.1, respectively. Effective atomic number (Z_eff) increased with doping at intermediate energies (e.g., from 29.02 to 35.47 at 0.5 MeV). Radiation protection efficiency (RPE) decreased with doping, from with transmission ranging from 43.07% to 46.34% at 0.5 MeV (1 cm thickness). Fast neutron removal cross-section (FNRCS) was highest for undoped MnWO₄ and decreased upon doping, though all samples exceeded the values for water and graphite. These findings demonstrate that Mg/Ti co-doping effectively tunes the structural, optical, and radiation shielding properties of MnWO₄ nanocrystals for potential optoelectronic and radiation protection applications.

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Title

Appl. Phys. A

Publisher

Springer

Publisher Country

United Kingdom

Indexing

Thomson Reuters

Impact Factor

2.8

Publication Type

Both (Printed and Online)

Volume

132

Year

2026

Pages

524