Welcome to the X-ray Diffraction Laboratory in the Central Laboratory of Minearlogy and Crystallography. We are a full service X-ray Diffraction laboratory offering state of the art instrumentation for the analysis of solid materials. Our services include single-crystal and powder diffraction x-ray scattering analysis for Material Sciences, Chemistry, Biochemistry,  and Pharmaceuticals. We are staffed by fully trained Ph.D. scientists who employ the most up to date diffraction and x-ray techniques. Please feel free to contact us about your diffraction needs.

About us

     Laboratory Services  

  • Single-Crystal Diffractometery

  • X-ray Powder Diffractometery High Resolution Powder Diffractometer 

  • Two-Dimensional X-ray Powder Diffractometery 

  • Structure Solution from single-crystal or powdered materials 

  • Qualitative and quantitative phase analysis

  • Micro-Powder Diffraction and high temperature powder diffraction

  • Polymorph and crystalline state Identification, Powder Pattern comparisons

  • Identification of unknown materials by x-ray powder pattern search and match routines

  • Identification of unknown materials by structure solution from single-crystal

 left to right: Boris Shivachev, Rosica Petrova, Louiza Dimova, Jana Tzvetanova, Ognyan Petrov, Vladislav Kostov

The purpose of our laboratory is to provide x-ray diffraction analysis to the Bulgarian Academic and University system. Our main focus is to determine molecular structure from single-crystal samples, to determine shape and size by powder x-ray scattering and to perform high resolution x-ray powder diffraction. We provide services to outside users on a collaborative basis. We are a full service facility, able to determine the three dimensional structure of molecules and solids, from powder and single crystal samples. We can determine various structural types from small inorganic solids to small macromolecules. 

 

Equipment

Powder X-ray diffractometer D2 Phaser (BrukerAXS), закупен и въведен в експлоатация през м. октомври 2009 г., Работи с набор от специализирани програми за обработка и визуализация на експерименталните данни (Diffrac Studio). Разполага с пълната база данни (PDF-2, PDF-4) на Международния център за дифракциаонни данни (ICDD) за фазов анализ; Cu лъчение.

Single crystal diffractometer Supernova (Oxford Diffraction -now Agilent), The SuperNova includes:

• Dual wavelength Cu/Mo Hi-flux micro-focus X-ray source

• 4-circle kappa goniometer

• 135mm Atlas CCD detector

• Nitrogen cryo-device

• CrysAlisPro - Data collection & processing software


Single crystal diffractometer CAD4 (Enraf Nonius, Netherlands), закупен през 1985 г., и е въведен в експлоатация през 1986 г., с възможности за прецизни измервания на атомните координати на монокристални проби. Работи със специализиран софтуер за сканиране и обработка на данните до пълна структурна разшифровка. Разполага със структурните бази данни Inorganic Crystal Structure Database (ICSD), Cambridge Structural Database (CSD) и Protein Database (PDB).

Powder X-ray diffractometer ДРОН 3М (Russia), закупен през 1985 г., и е въведен в експлоатация през 1986 г. Работи с локално приспособен компютър и съответни драйвери за стъпков режим на сканиране, както и с набор от специализирани програми за обработка и визуализация на експерименталните данни. Разполага с пълната база данни (PDF-2, PDF-4) на Международния център за дифракциаонни данни (ICDD) за фазов анализ.

 

Type of samples:

  • Natural and synthetic mineral, organic, inorganic, biological phases: crystals, zeolites, metals, glasses, ceramics, etc. (see personnel Research fields and interests)

  • Singlecrystals;

  • Thin films,

  • Liquids, gels.

Single crystal structural investigation of new phases (mineral, organic, inorganic, biological)

Powder diffraction analysis:

  • Phase analysis;

  • Rietveld Refinement, Rietveld Analysis, Rietveld Technique, Rietveld Calculation;

  • Rietveld Quantitative Phase Analysis of geological samples (FullProf);

  • Powder diffraction peak profile analysis;

  • High temperature in-situ phase transitions and crystallization

     

 Head of the Lab

Associate Professor Rositsa Nikolova, PhD

Research and Academic Staff

Professor Ognyan Petrov, PhD
Associate Professor Vladislav Kostov, PhD
Associate Professor Boris Shivachev, PhD
Assistant Professor Stanislav Ferdov, PhD
Jana Tzvetanova, MSc, PhD Student
Assistant Professor Louiza Terziyska Dimova, PhD
Assistant Professor Milen Kadiysky, PhD

 PhD Students

Liliya V. Tzvetanova
Hristian I. Svirkova
Vencislav Dyulgerov
Marian Entcheva