Stabilization of the monoclinic phase of KH2PO4 under restricted geometry conditions
Alekseeva O. A. 1, Enikeeva M. O. 1, Naberezhnov A. A. 1, Sysoeva A. A. 1
1Ioffe Institute, St. Petersburg, Russia
Email: alekseeva.oa@mail.ioffe.ru, alex.nabereznov@mail.ioffe.ru, annasysoeva07@mail.ru

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From the analysis of X-ray diffraction patterns the crystal structure of KH2PO4 embedded from an aqueous solution into the pore space of porous glass with an average pore diameter of 7± 1 nm was determined. It has been established that at room temperature KH2PO4 nanoparticles crystalizes in a monoclinic structure, which is metastable in bulk KH2PO4 under normal conditions. The characteristic size of potassium dihydrogen phosphate nanoparticles was determined to be (27± 3 nm) in the pores of this matrix. Keywords: potassium dihydrogen phosphate, crystal structure, diffraction, nanocomposite materials, nanoporous glass.
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