• PANKAJ RAMESHRAO UIKEY
• Ramesh M. Thombre
• Ratan Meshram
• Vijay Raghorte
• Roshan Tadurwar

Potassium Titanyl Phosphate (KTP, KTiOPO4) is a nonlinear optical crystal widely utilized in frequency conversion and electro-optic devices due to its exceptional optical properties. This study employs X-ray diffraction (XRD) to characterize the crystallographic structure of a KTP crystal. High-resolution XRD data, collected over a 2θ range of 3 to 80, reveal a series of sharp diffraction peaks consistent with the orthorhombic Pna21 space group. This study reports the structural, vibrational, and optical characterization of a KTiOPO4 (KTP) crystal using X-ray Diffraction (XRD), Fourier-Transform Infrared (FTIR) spectroscopy, and UV-Visible (UV-Vis) absorption spectroscopy. XRD analysis confirmed the successful synthesis and high crystalline quality of the material. The pattern exhibited sharp, high-intensity diffraction peaks, which were indexed to the characteristic single-phase, orthorhombic crystal structure of KTP. The UV-Vis spectrum defined the electronic properties, showing a strong absorption maximum at 350 nm corresponding to the O2- ---Ti4+ charge-transfer transition. The absorption onset at 400nm yielded an estimated optical band gap {Eg) of {3.10 eV}, verifying the material's wide transparency window essential for its nonlinear optical applications. FTIR spectroscopy confirmed the presence of the fundamental structural units, with characteristic stretching vibrations of the PO4 tetrahedra and TiO6 octahedra evident in the 400 - 1200 cm-1 region. However, a significant, uncharacteristic absorption band was observed at 2250cm-1, assigned to an impurity (likely a C=N functional group). The simultaneous confirmation of the KTiOPO4 phase by XRD and the identification of a potentially critical impurity by FTIR provide comprehensive data for quality assessment.

: KTP, Characterization XRD, NLO

"Multi -mode structural Characterization of Potassium Titanyl Phosphate (KTP) Crystal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 12, page no.b34-b40, December-2025, Available :http://www.jetir.org/papers/JETIR2512106.pdf

"Multi -mode structural Characterization of Potassium Titanyl Phosphate (KTP) Crystal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 12, page no. ppb34-b40, December-2025, Available at : http://www.jetir.org/papers/JETIR2512106.pdf