Structural and optical properties of ${\text{A}\text{W}\text{O}}_4$ $(\text{A}=\text{B}\text{a}$, $\text{S}\text{r}$, $\text{C}\text{a}$, $\text{M}\text{g},$ and $\text{Z}\text{n})$ ceramics were investigated. The structural analysis confirmed the scheelite-type tetragonal structure for $(\text{A}=\text{B}\text{a}$, $\text{S}\text{r}$ and $\text{C}\text{a}){\text{W}\text{O}}_4$ and wolframite-type monoclinic structure for $(\text{A}=\text{Z}\text{n}$ and $\text{M}\text{g}){\text{W}\text{O}}_4$ compounds. The experimentally observed optical band gap (E_g) found to be in the range of 4.17-5.92 eV agree with those calculated with the help of density functional theory. A decrease in band gap value with the decrease in ionic radii of A²⁺ in the ${\text{A}\text{W}\text{O}}_4$ compound was observed. An intense blue-green photoluminescence emission was observed for these materials and correlated with E_g. The environmental factor $h_e$ calculated by complex chemical bond theory has been correlated with the broadening of PL excitation bands. The excitation spectra revealed that there subsists a negative relation between $h_e$ and position of energy levels.

的结构和光学性质 ${\text{一种}\text{w ^}\text{Ø}}_4$ $（\text{一种}=\text{乙}\text{一种}$， $\text{小号}\text{[R}$， $\text{C}\text{一种}$， $\text{中号}\text{G}，$ 和 $\text{ž}\text{ñ}）$陶瓷进行了调查。结构分析证实白钨矿型四方结构为$（\text{一种}=\text{乙}\text{一种}$， $\text{小号}\text{[R}$ 和 $\text{C}\text{一种}）{\text{w ^}\text{Ø}}_4$ 和黑钨矿型单斜构造 $（\text{一种}=\text{ž}\text{ñ}$ 和 $\text{中号}\text{G}）{\text{w ^}\text{Ø}}_4$化合物。实验观察到的光学带隙（E _g）在4.17-5.92 eV的范围内，与借助密度泛函理论计算得出的结果一致。在带隙值的减少与在A的离子半径的减小²⁺在${\text{一种}\text{w ^}\text{Ø}}_4$观察到化合物。这些材料观察到强烈的蓝绿色光致发光，并与E _g相关。环境因素$H_{Ë}$复杂化学键理论计算出的峰强度与PL激发谱带的扩展有关。激发光谱表明，两者之间存在负相关$H_{Ë}$ 和能量水平的位置。