Group leader Dr.Sc., Prof. Dolgikh V.A. Phone: 007-(495)-939-3504 email dolgikh *

Ph.D. Associate Prof. Ardashnikova E.I. ard*

Ph.D. Associate Prof. Berdonosov P.S. berdonosov*

Ph.D. S Associate Prof. Charkin D.O. charkin*

GROUP ALUMNI

 RESEARCH ACTIVITIES

Determination of the correlations between composition, structure ferroelectric, ion-conducting and nonlinear optic properties of crystals as the scientific base for design and synthesis of inorganic compounds with required properties.

MAIN OBJECTS UNDER INVESTIGATION IN THE RECENT YEARS

Complex tellurites and selenites of bismuth and rare earth elements (REE), complex oxohalogenides and oxochalkogenides.

Large family of layered oxyhalogeniges of Bi(REE)-Te belonging to a new type was discovered and investigated. This family has a high percentage of compounds with noncentrosymmetric structures. Among them the phases were found having high nonlinear optic parameters and unique combination of piezoelectric and pyroelectric parameters advantageous for pyroelectric applications.
The correlations between the composition and the structure were determined for the phases in this group.
With the help of planned heterovalent substitution of Bi or REE atoms in their fluorite-like oxofluorides, new anion-conducting phases with wide homogenity regions were obtained. The correlation between nonstoichiometry and transport characteristics of these solid solutions were determined.
Current interests include design, synthesis, crystallographic and SHG characterization of new layered and inorganic open framework phases.

Research highlights

BiOCuSe First Bi compound with LnOTX (Ln - lanthanide, Bi; T = Cu, Ag; X = S, Se, Te, T = Fe, Ni, X = P, As) structure	α--BiSeO3Cl First Selenate(IV) chloride of Bi (III) with NCS structure
SrTeO3 Ferroelectric with unusual properties and complex structure	MNd10(SeO3)12Cl8 (M=Ca, Sr) First Alkaline Earths representatives of M11(SeO3)12Xx phase family

COLLABORATIONS

Prof. P. Lightfoot  in the School of Chemistry  at the University of St Andrews, UK

Prof. Dr. rer. nat. Michael Ruck Anorganische Chemie der TU Dresden,  Germany

Professor Alain Tressaud Research Director at ICMCB-CNRS, University Bordeaux 1 (France)

CURRENT PROJECTS:

RFBR 14-03-00604 Design and targeted synthesis of novel hybrid inorganic phases - salt inclusion solids Supervisor V.A. Dolgikh

FINISHED PROJECTS:

RFBR 11-03-00776 The synthesis concept and targeted synthesis of inorganic crystal phases with structures based on open framework 2011-2013 Supervisor V.A. Dolgikh
RFBR Royal Society UK 12-03-92604-KO-a A Crystal-chemical Approach to New Frustrated Magnets 2012-2013 Supervisor V.A. Dolgikh  
RFBR 12-03-00665 Directed synthesis of low dimensional d-metal complex selenite-halides as possible frustrated magnets 2012-2014 Supervisor P.S. Berdonosov

RFBR 09-03-00799 Synthesis of the complex s-/d-metals,Bi/d-metal selenates(IV) halides and tellurates(IV) halides with noncentrosymmetrical structures 2009-2011 Supervisor P.S. Berdonosov
RFBR 09-03-01064 Development and application of modular approach to design and synthesis of complex inorganic layered perovskites 2009-2011 Supervisor D.O. Charkin

RFBR 08-03-00548 The crystal chemistry approach to the design and targeted synthesis of new open-framework inorganic phases 2008-2010 Supervisor V.A. Dolgikh

2015

Dmitri O.Charkin, Igor V. Plokhikh, Alexey N. Kuznetsov, Sergey M. Kazakov  BaFAlSi and BaFAlGe: First transition metal-free LaOAgS-type fluoride tetrelides  // Journal of Alloys and Compounds 627 (2015) 451-454  

Dmitri O. Charkin, Cameron Black, Lewis J. Downie, Dmitry E. Sklovsky, Peter S. Berdonosov, Andrei V. Olenev, Wuzong Zhou, Philip Lightfoot, Valery A. Dolgikh Cs₇Sm₁₁[TeO₃]₁₂Cl₁₆ and Rb₇Nd₁₁[TeO₃]₁₂Br₁₆, the new tellurite halides of the tetragonal Rb₆LiNd₁₁[SeO₃]₁₂Cl₁₆ structure type // Journal of Solid State Chemistry (2015) doi:10.1016/j.jssc.2015.08.043  

2014

Dmitri O. Charkin, Arthur V. Urmanov, Igor V. Plokhikh, Alexander D. Korshunov, Alexey N. Kuznetsov, Sergey M. Kazakov Synthesis and crystal structures of novel LaOAgS-type alkaline earth - Zinc, manganese, and cadmium fluoride pnictides  // Journal of Alloys and Compounds 2014, Vol. 585, Pages 644-649  

V.A.Sidorov, A.E.Petrova, P.S.Berdonosov, V.A.Dolgikh and S.M.Stishov Comparative study of helimagnets MnSi and Cu₂OSeO₃ at high pressures// PHYSICAL REVIEW B 89 (2014) 100403(R)

Ivan D. Kharitonov, Dmitri O. Charkin, Peter S. Berdonosov, Cameron Black, Lewis J. Downie, Philip Lightfoot and Valery A. Dolgikh Rare-earth cadmium tellurite chlorides with a new structural type exhibiting [Ln₁₂(TeO₃)₁₂] slabs alternating with CdCl₆ octahedral layers // European Journal of Inorganic Chemistry  Volume 2014, Issue 19, pages 3140- 3146, July 2014 DOI:10.1002/ejic.201402177

Peter S. Berdonosov, Elena S. Kuznetsova, Valery A. Dolgikh, Alexei V. Sobolev, Igor A. Presniakov, Andrei V. Olenev, Badiur Rahaman, Tanusri Saha-Dasgupta, Konstantin V. Zakharov, Elena A. Zvereva,  Olga S. Volkova, and Alexander N. Vasiliev  Crystal Structure, Physical Properties, and Electronic and Magnetic Structure of the Spin S = 5/2 Zigzag Chain Compound  Bi₂Fe(SeO₃)₂OCl₃ // Inorg. Chem 53 (2014) 5830−5838 DOI 10.1021/ic500706f

L.J. Downie, C. Black, E.I .Ardashnikova, C.C. Tang,, A.N. Vasiliev, A.N. Golovanov, P.S. Berdonosov, V.A.Dolgikh and P. Lightfoot Structural phase transitions in the kagome lattice based materials Cs_2−xRb_xSnCu₃F₁₂ (x =0, 0.5, 1.0, 1.5) // CrystEngComm, 2014, 16, 7419-7425 DOI: 10.1039/c4ce00788c