KPr(PO(3))(4).

Area of Science:

• Inorganic Chemistry
• Solid-State Chemistry
• Crystallography

Background:

• Potassium rare-earth polyphosphates (KLn(PO3)4) are a class of inorganic compounds with diverse structural motifs.
• Understanding the crystal structures of these materials is crucial for exploring their physical and chemical properties.

Purpose of the Study:

• To synthesize single crystals of potassium praseodymium(III) polyphosphate.
• To determine and characterize its crystal structure.
• To compare its structure with other known KLn(PO3)4 analogues.

Main Methods:

• Solid-state reaction for crystal synthesis.
• Single-crystal X-ray diffraction for structure determination.

Main Results:

• Single crystals of potassium praseodymium(III) polyphosphate were successfully obtained.
• The compound crystallizes in a monoclinic, non-centrosymmetric structure.
• It is isotypic with KLn(PO3)4 analogues (Ln = La to Er), featuring infinite polyphosphate chains and PrO8 square anti-prisms forming a 3D framework.
• Potassium ions are located in channels along [010] with distorted coordination.

Conclusions:

• The crystal structure of potassium praseodymium(III) polyphosphate is elucidated.
• The findings confirm its structural relationship with other rare-earth analogues.
• The detailed structural analysis provides a basis for further investigation of its properties.