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The X-ray laboratory was established by Academician Professor N.V.Belov in 1943. At present the
main scientific trend of the laboratory relates to establishing correlations between crystal structure and physical
properties of crystalline materials. The methods of precision X-ray diffraction studies are being successfully used
in the laboratory for determination of the crystal structure of single crystals of various origin - from minerals
to biologically active small molecules. Temperature studies and investigations under pressure give grounds for
understanding phase transition mechanism at the atomic level. Structural studies of modulated phases are being
carrying out intensively as well. The studies of the anomalous behaviour in the thermal vibrations of atoms provide
important information on the changes in the chemical bonding in the crystal in the course of the second-order phase
transition. The main scientific results of the last period deal with following research trends:
- X-ray structure studies of the Tl and Y-high-temperature superconductors below and above the superconducting phase transition.
- The precision structural investigations of Na1+ and Li1+ solid electrolytes in their superionic phase transition.
- Studies of non-linear optical crystals materials on the basis of KTiOPO4 solid solutions family. Establishing
the ways for controlled modification of their non-linear, superionic, and ferroelectric properties by means of
isomorphous replacements.
- Studies of (M2+1-xR3+x)F2+x solid solutions including their clusters
structure and analysis of strictural grounds for their high ionic F1- conductivity.
- Precision structural studies of the crystals possessing special physical properties -
such as La3Ga5SiO14, (Ba,Sr)Nb2O2, LiNbO3: Zn, K(H,D)PO4 and others.
Three Doctors of Sciences, nine Candidates of Sciences, a staff of skilled engineers-designers
are currently working at the laboratory. The laboratory is equipped with four 4-circle single crystal
diffractometers (temperature up to 10K) and photographic X-ray apparatus for intensity recording.
Several publications which reflect the main scientific trends of the Laboratory:
- 1). Superconducting Single Crystals of Tl2Ba2CaCu2O8 and YBa2Cu4O8:
Crystal Structures in the Vicinity of Tc. V.N.Molchanov, V.I.Simonov Acta Crystallographica, A54, p.6, N.1, 905-913, 1998.
- 2). Structural Study of TlTiOPO4 Single Crystals at 11K. M.K.Blomberg, M.J.Merisalo,
N.I.Sorokina, D.Yu Lee, I.A.Verin, V.I.Voronkova, V.K.Yanovskii, V.I.Simonov Crystallography Reports, 43, N.5, 748-757, 1998.
(Translated from Kristallografiya, 43, N.5, 801-811, 1998).
- 3). Composite Crystal Structure of Modulated Twinned High-Pressure Mg2Sn1.1 Phase.
N.B.Bolotina, V.Petricek, V.I.Simonov, T.I.Dyuzheva, N.A.Bendeliani Crystallography Reports, 42, N.6, 896-905, 1997.
(Translated from Kristallografiya, 42, N.6, 972-981, 1997).
- 4). Crystal Structure of Ba0.39Sr0.61Nb2O6 Single Crystals.
T.S.Chernaya, B.A.Maksimov, I.A.Verin, L.I.Ivleva, V.I.Simonov Crystallography Reports, 42, N.3, 375-380, 1997.
(Translated from Kristallografiya, 42, N.3, 421-426, 1997).
- 5). Structural Studies of CaF2 (at 296K) and Ca1-xPrxF2+x (at 296 and 170K)
Crystals with x=0.1: The Changes in the Fluorite Anionic Motif in the Partial Substitution of
Ca2+ by Pr3+ Cations. E.A.Zhurova, B.A.Maksimov, V.I.Simonov, B.P.Sobolev
Crystallography Reports, 41, N.3, 413-418, 1996. (Translated from Kristallografiya, 41, N.3, 438-443, 1996).
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