Bogdana Petrova
ZIDAROVA

Assoc. Professor, D.Sc.

Central Laboratory of Mineralogy and Crystallography (CLMC), “acad. Ivan Kostov”
Bulgarian Academy of Sciences (BAS)
Web site: http://www.clmc.bas.bg
1113 Sofia, Acad. G. Bonchev Str., Bl. 107, Bularia
Phone: (+3592) 8700161 / 59; Fax.: (+3592) 9797056
E-mail: zidarova@interbgc.com

CURRICULUM VITAE:

Date and place of birth: December 24 1945, Sofia, Bulgaria

Current position:

Education:

  • M.Sc. in Geology and Geochemistry (Geology-Geographic Faculty), Sofia University "St. Kliment Ohridski" (1966-1971);
  • Junior research fellow at the Institute of Geology, Bulgarian Academy of Sciences (1971-1977);
  • Laboratory of Experimental and Technical Mineralogy, Bulgarian Academy of Sciences (1978-1983);
  •  Institute of Applied Mineralogy Bulgarian, Academy of Sciences(1984-1995);
  • D. Sc. at the Institute of Applied Mineralogy, Bulgarian Academy of Sciences (1990) "Mineralogical Characteristics and Genesis of the Fluorite in the Industrial Deposits in Bulgaria";
  • Assoc. Prof. (1992) at the Institute of Applied Mineralogy, Bulgarian Academy of Sciences;
  • Assoc. Prof. (1995) at Central Laboratory of Mineralogy and Crystallography (CLMC), “acad. Ivan Kostov”, Bulgarian Academy of Sciences.
Fields of research: Crystal morphology, fluid inclusions and spectroscopy of minerals, regional mineralogy, geochemistry, applied mineralogy and crystal growth of minerals.

Languages: Russian, English and French

Fellowships:

  • Specialization in Institute of Crystallography (Laboratory of Hydrothermal Synthesis), Academy of Sciences URSS, Moscow (1974-1975);
  • Specialization in Institute of Geology, Republic Komi, Academy of Science URSS (1982)
  • Specialization in Institute of Geology, Republic Komi, Academy of Science URSS (1984)
Professional experience and Administrative positions:
  • 1995 - 2007: Head of Department "Topographical mineralogy"
  • 1997 - 1998: Scientific secretary of the Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences
  • 1997 - 1998: Scientific secretary of the Scientific Council of the Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences
  • 1997 - 1998: Chair of the Common Meeting of the Scientists of the Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences
  • 1990 - 1998: Co-chair of Union of the Discoverers and Inventors in Bulgaria
  • 1996 - present: Member of the Club of the Discoverers and Inventors “Golden Book”
  • 2001 - present: Member of the National Expert Council of Nanoscience and Nanotechnology to the Bulgarian Academy of Sciences
  • 2006 - present: Member of the Scientific Commission of Geology and Geographic Sciences to Higher Attestation Commission of the Ministerial Council, Republic Bulgaria
  • 2007 – 2008: Chair of the Problem’s Council “Natural resources” to the Executive Council of the Bulgarian Academy of Sciences
  • 2009 - present: Chair of the Problem’s Council “Natural resources, hazards and climate change” to the Executive Council of the Bulgarian Academy of Sciences

Scientific awards:

  • Holder of the honorary mark by INRA (1985)
  • Entry in the "Golden book of INRA" (1985)
  • Holder of the prize of Academy of Sciences USSR and Bulgarian Academy of Sciences for the best joint work (1987)
  • Golden badge "Prof. A. Zlatarov" for high scientific-technical achievements by the Bulgarian Scientific-Technical Union (2001)
  • Golden Diploma, Golden Card, Golden badge for gain high prestige and social recognized for contribution to authority on Bulgaria by National forum of experts, Academy for leaders with contribution to progress at the country (2006)
  • Series of charters, diplomas and emblems for the best scientific achievements

Professional memberships:

  • Bulgarian Geological Society - regular member (since 1971)
  • Bulgarian Mineralogical Society – co-chair (since 2008), member in the board (1996 - 2008) and regular member (since 1990)
  • Union of the Bulgarian Scientists - regular member (since 1987)
  • European Mineralogical Union - regular member (since 1973)
  • Professional Women’s Advisory Board of the American Biographical Institute - regular member (since 2007)

Scientific Discovery: 1 (Abroad - No. 270/1985, URSS) and 1 (No. 4/1985, Bulgaria):

  • Zidarova, B. P., M. N. Maleev, I. N. Kostov, D. P. Grigoriev, N. Z. Evzikova, D. A. Mineev, V. A. Popov, I. I. Shafranovskii, N. P.Yushkin. 1985. Regularity in the spatial-temporal modification of the morphology of the mineral individuals in the natural crystal-forming processes. – April 30 - No. 270/1985, URSS.
  • Kostov, I. N., M. N. Maleev, B. P. Zidarova, D. P. Grigoriev, N. Z. Evzikova, D. A. Mineev, V. A. Popov, I. I. Shafranovskii, N. P.Yushkin. 1985. Regularity in the evolution crystal morphology of the minerals in the mineral-forming processes.– May 21 - No. 4/1985, Bulgaria.

Patents: 2 (Abroad) and 2 (Bulgaria):

  • Bukanov, V. V., D. P. Grigoriev, N. Z. Evzikova, D. A. Mineev, M. N. Maleev, B. P. Zidarova. 1982. Method of mineralogical prospection and evaluation of mineral deposits. - Certificate No57641/4.08.1982 - URSS
  • Yushkin, N. P., G. A. Markova, N. B. Volkova, B. P. Zidarova, M. N. Maleev. 1986. Method for evaluation of the quality of raw fluorite. - Certificate No1276078/11.08.1986 - URSS
  • Zidarova, B.P., M. N. Maleev, N. P. Yushkin, G. A. Markova, N. B. Volkova. 1986. Method for evaluation of the quality of raw fluorite, suitable for growing synthetic single crystals of calcium fluoride. - Certificate No39364/27.06.1986 - Bulgaria
  • Zidarov, N. G., B. P. Zidarova. 1993. Method for separation of industrial bodies consisting fluorite raw materials in the Earth’s crust, suitable for production of optical fluorite. - Certificate No51788/30.09.1993 - Bulgaria

 

Publications: Author of more than 70 scientific publications and reports in journals, proceedings and monographs

Citations: More than 150

Research projects: 3 (Abroad) and 35 (Bulgaria)

Selected publications:


1. Gabrovska-Zidarova, B. P. 1977. Vertical Temperature Zonality in the Mikhalkovo Ore Field. - In: Problems of Ore Deposition (4th IAGOD Symposium, September 19-25, Varna, 1974), vol. II, 163-170.
2. Zidarova, B. P. 1978. Hydrothermal Synthesis of Fluorite. - Geochem., Mineral. and Petrol., vol. 8, 27-36. (in Russian with English abstract)
3. Zidarova, B., M. Maleev, I. Kostov. 1978. Crystal Genesis and Habit Zonality of Fluorite from the Mikhalkovo Deposit, Central Rhodope Mountains. - Ceochem., Mineral. and Petrol., vol. 8, 3-26.(in Bulgarian with Russian and English abstracts)
4. Zidarova, B., I. Kostov. 1979. Peculiarities of the Fluorite fro the Palat Deposit, District of Blagoevgrad. - Geochem, Mineral. and Petrol., vol. 11, 51-65. (in Bulgarian with Russian and English abstracts)
5. Piperov, N. B., N. P. Penchev, B. P. Zidarova. 1979. The Analysis of Volatiles from Fluid Inclusions in the Hydrothermal Fluorite. - Chemical Geology, vol. 27, 215-231.
6. Zidarova, B., N. Duderov. 1980. Solubility of Fluorite in Aqueous Solutions of NH4Cl under Hydrothermal conditions. - Ceochem., Mineral. and Petrol., vol. 12, 29-37. (in Russian with English abstract)
7. Piperov, N. B., N. P. Penchev, B. P. Zidarova. 1981. New Data from Studies on Fluid Inclusions in Hydrothermal Fluorites (Mikhalkovo, Bulgaria) with Respect to Mineral genesis. - Chemical Geology, vol. 32, 87-94.
8. Grigoriev, D. P., N. Z. Evzikova, B. P. Zidarova, I. N. Kostov, S. K. Kuznetsov, M. N. Maleev, D. A. Mineev, V. A. Popov, B. V. Chesnokov, I. I. Shafranovskii, N. P. Yushkin. 1981. Crystallomorphological Evolution of the Minerals. - Series papers "Scientific reports", vol. 76, Syktyvkar, 28 p. (in Russian)
9. Ashabov, A. M., B. P. Zidarova. 1983. Experimental Investigation of the Gravitational Differentiation Solutions in the Kinetic of Dissolve of the Minerals. - Union symposium "Contemporary technique and methods in the experimental mineralogy", May 18-20, Chernogolovka, USSR, 7-8. (in Russian)
10. Ashabov, A. M., B. P. Zidarova. 1983. Experimental Confirmation on the Gravitational Differentiation of the Mineral Solution in the Hydrothermal Conditions. - In: Geology and mineral resources of European Northeast of USSR, Syktyvkar, 59-60. (in Rusian)
11. Zidarova, B. P., A. M. Ashabov. 1984. Solution and Resolution Fluorite Spheres in the Hydrothermal Conditions. - Works of the Geology Institute, Syktyvkar, vol. 46, 49-55. (in Russian)
12. Zidarova, B. P., G. A. Markova, V. N. Kalikov. 1984. Zonality and Dynamics of Fluorite Formation in the Palat Deposit (Bulgaria). - In: Topomineralogy and minerals ore bearing regions, (Works in the Geology Institute), Syktyvkar, vol. 45, 113-125. (in Russian)
13. Zidarova, B., N. Zidarov. 1985. Tipomorphic Characteristics of Fluorite from Mikhalkovo and Palat Deposits, as Criteria for Prognosis of the Fluorite Mineralization. - Workshop "Recicling of mineral raw materials", may 1985, Varna, 8. (in Bulgarian)
14. Piperov, N. B., N. P. Penchev, B. P. Zidarova. 1986. Evidence for the Chemical Nature of Fluorite-depositing Solutions Based on the Fluid Inclusion Studies (Palat, Bulgaria). - In: Conditions of the forming on the ore deposits (6th IAGOD Symposium, September 6-12, Tbilisi, USSR), vol. 1, Moscow, 354-365.
15. Zidarova, B. P., N. B. Piperov. 1986. Some Observations and Thermal Measurements of Fluid Inclusions in Synthetic Fluorite Crystals. - 7th IAGOD Symposium, August 18-22, Luleå, Sweden.
16. Grigoriev, D. P., N. Z. Evzikova, B. P. Zidarova, I. N. Kostov, S. K. Kuznetsov, M. N. Maleev, D. A. Mineev, V. A. Popov, B. V. Chesnokov, I. I. Shafranovskii, N. P. Yushkin. 1986. Evolution of the Crystal Forms in the Mineral-forming Processes. - In: Morphology and Phase Equilibrium of Minerals (Proceedings of the XIIIth General Meeting of the IMA-82, September 19-25, Varna), 11-26.
17. Zidarov, N., B. Zidarova, A. Sekiranov, I. Klimov. 1987. Topomineralogical Study of the "Slavyanka" Mine Fluorite Mineralization in the District of Blagoevgrad. - Ore-forming Processes and Mineral Deposits, vol. 26, 20-32. (in Bulgarian with Russian and English abstracts)
18. Zidarova, B. P. 1989. Mineralogical Peculiarities and Genesis on Fluorite in the Industrial Deposits in Bulgaria. - D. Sc. thesis, Sofia, Bulgarian Academy of Sciences, 287 p.
19. Zidarova, B. P. 1989. Evolution of Habit Forms of Fluorite Crystals from the Mikhalkovo Deposits, Central Rhodopes. - In: Geologica Rhodopica (First Bulgarian-Greek Symposium on Geological and Physics-geographical Problems of the Rhodope Massif under the Agreement between Sofia University Kliment Ohridski and the Aristotle University of Thessaloniki, September 16-19, Smolyan, Bulgaria), vol. I, Kliment Ohridski University Press, 427-430.
20. Zidarova, B. P., N. G. Zidarov. 1989. Main Features of the Origin of the Mikhalkovo Fluorite Deposits. - In: Geologica Rhodopica (First Bulgarian-Greek Symposium on Geological and Physics-geographical Problems of the Rhodope Massif under the Agreement between Sofia University Kliment Ohridski and the Aristotle University of Thessaloniki, September 16-19, Smolyan, Bulgaria), vol. I, Kliment Ohridski University Press, 420-426.
21. Zidarov, N. G., B. P. Zidarova. 1989. Geology-Mineralogy Criterions for the Separated in the Earth's Crust. - In: Extended abstracts of the XIV Congress KGBA, September 20-23, Sofia, Bulgaria, vol. IV, 1266-1269. (in Russian)
22. Zidarova, B. P. 1990. X-ray Luminescence - Method of the Estimate on the Quality of Natural Fluorite. - In: Methods and Technologies of Research for Mineral Raw Materials, vol. I, Technique, Sofia, 136-140. (in Bulgarian)
23. Zidarova, B. P. 1992. The Effect of Cerium in Raw Fluorite on the Optical Quality of Synthetic Single Crystals. - Compt. rend. Acad. bulg. Sci., tome 45, no. 3, 73-74.
24. Zidarova, B. P. 1992. Thermoluminescence Characterization of Fluorites in the Slavyanka, Mikhalkovo and Ciprovci Deposits. - Compt. rend. Acad. bulg. Sci., tome 45, no. 8, 67-70.
25. Zidarova, B. P., N. G. Zidarov, G. A. Markova, N. P. Yushkin. 1992. Influence of the Natural Raw Material on the Quality of Synthetic Fluorite Single Crystals. - Compt. rend. Acad. bulg. Sci., tome 45, no. 3, 69-72.
26. Ashabov, A. M., B. P. Zidarova. 1992. Mechanism and Crystallogenetic Consequences Gravitational Differentiation by the Hydrothermal Solutions. - Works in the Geology Institute, Syktyvkar, vol. 77, 61-68. (in Russian)
27. Zidarov, N., Zh. Damyanov, B. Zidarova. 1992. Types and Distribution of Oxidized Siderite Ores in Kremikovtci Deposit. - Rev. Bulg. Geol. Soc., vol. 53, part 3, 19-32. (in Bulgarian with English abstract)
28. Zidarova, B. P. 1993. The Origin of Color in Fluorite from Bulgarian Deposits. - Compt. rend. Acad. bulg. Sci, tome 46, no. 9, 69-72.
29. Zidarov, N., B. Zidarova. 1994. Mineralogical Zonality of Metasomatic Fluorite Bodies in Ciprovci Deposit. - Compt. rend. Acad. bulg. Sci, tome 47, no. 7, 51-53.
30. Zidarova, B. P. 1995. The Distribution of La and Tb in Hydrothermal Fluorite from the Slavyanka Deposit as an Indication for the Processes of Rearrangement and Redeposition. - Compt. rend. Acad. bulg. Sci., tome 48, no. 3, 37-40.
31. Zidarova, B. P. 1995. Type and Distribution of the Fluorite Chemical Inhomogeneity in Slavyanka Deposit. - Geochem., Mineral. and Petrol., vol. 30, 99-106. (in Bulgarian with English abstract)
32. Zidarova, B. P., N. B. Piperov. 1995. Temperature and Molecular Composition of the Mineral-forming Fluids in Slavyanka Fluorite Deposit. - Rev. Bulg. Geol. Soc., vol.56, part 2, 9-18. (in Bulgarian with English abstract)
33. Zidarova, B., N. Zidarov. 1995. Mechanism of Fluorite Formation in Hydrothermal Paleokarst of the Mikhalkovo Deposit. - Compt. rend. Acad. bulg. Sci., tome 48, no. 3, 41-43.
34. Zidarova, B., N. Zidarov. 1995. Main Elements of the Local Geogenetic Model for Fluorite Formation: I. Slavyanka Deposit. - Compt. rend. Acad. bulg. Sci., tome 48, no. 8, 33-36.
35. Zidarova, B., N. Zidarov. 1995. Main Elements of the Local Geogenetic Model for the Fluorite Formation: II. The Mikhalkovo Deposit. - Compt. rend. Acad. bulg. Sci., tome 48, no. 9-10, 87-90.
36. Zidarova, B. P., N. G. Zidarov. 1995. Processes of Fluorite Formation in the Slavyanka Deposit, South -Western Bulgaria. - Geol. Soc. Greece (XV Congress of KBGA, September 17-20), Sp. Publ., no. 4, 869-872.
37. Piperov, N., B. Zidarova. 1995. Fluid Inclusions in Synthetic Fluorite Crystals - Checking of Analytical Procedures and Thermal Investigations. A Priori Stretched Inclusions? - N. Jb. Miner. Mh., vol. 5, 224-240.
38. Zidarov, N., B. Zidarova. 1996. Fluorite Mineralization in Chiprovtsi Ore Zone - Characterisitics, Development and Morphogenetic Types. - Rev. Bulg. Geol. Soc., vol. 57, part 3, 1-14. (in Bulgarian with English abstract)
39. Dontchev, I., B. Zidarova. 1999. Mineralogical-Technological Studies of Products from the Copper Slags Dressing Plant "Union Minier Pirdop Copper". - Geology and Mineral Resources, vol. 2, 13-16. (in Bulgarian with English abstract)
40. Zidarova, B., N. Zidarov. 2000. Main Elements of the Local Geogenetic Model for Fluorite Formation: III. Chiprovci East Deposit. - Compt. rend. Acad. bulg. Sci., tome 53, no. 5, 63-66.
41. Zidarov, N., B. Zidarova. 2000. The Collection "Fluorite Mineralization in the Slavyanka Deposit, SW Bulgaria" of the Central Laboratory of Mineralogy and Crystallography, BAS - an Example for Ex-Situ Preservation of the Mineral Diversity. - In: Proceedings of the International Symposium-2000 "Mineral Diversity - Research and Preservation", October 6-9, Earth and Man National Museum.
42. Zidarova, B., M. Marinov, N. Zidarov. 2002. Mathematical Model for the Growth of Fluorite Aggregates in Caverns in Slavyanka Deposit. - Compt. rend. Acad. bulg. Sci., tome 55, no. 3, 59-64.
43. Penev, V., N. Zidarov, B. Zidarova. 2002. Geometrization of the Language of Mineralogy: I. Formulation of the Problem and Outlining the Way of its Solution. - Compt. rend. Acad. bulg. Sci., tome 55, no. 5, 47-50.
44. Zidarova, B. 2003. Rare Earth Elements in Natural Fluorite as Indicators of Mineral-forming Environment. - Compt. rend. Acad. bulg Sci., tome 56, no. 11, 19-26.
45. Zidarova, B., N. Zidarov. 2004. Main Elements of the Common Geogenetic Model for Deposits of the Fluorite Ore Formation in Bulgaria. - Rev. Bulg. Geol. Soc., v. 65, part 1-3, 55-66. (in Bulgarian with English abstract)
46. Penev, V., N. Zidarov, B. Zidarova. 2004. Geometrization of the Language of Mineralogy: II. Formulation and Logical Analysis of the Structural Paradigms that Underlie the Language of Mineralogy. – Comp. rend. Acad. bulg. Sci., tome 57, no. 7, 59-64.
47. Penev, V., N. Zidarov, B. Zidarova. 2004. Geometrization of the Language of Mineralogy: III. Entirely Mathematical Coordinate Representation of Mineral Structures. – Comp. rend. Acad. bulg . Sci., tome 57, no. 7, 65-70.
48. Penev, V., N. Zidarov, B. Zidarova. 2005. Logical Analysis and Mathematical Formalization of the Foundations of the Language of Mineralogy – a Premise for Its Geometrization. – Annual of the Sofia University "St. Kl. Ohridski", Department Geology and Geography, book 1 - geology, tome 97, 85-96. (in Bulgarian with English abstract)
49. Zidarov, N., B. Zidarova. 2005. Mineral Systems: Composition, Conditions and Processes of Formation, Alteration, and Interaction. – In: “Ten years Central Laboratory of Mineralogy and Crystallography “acad. I. Kostov”, BAS, Acad. Publishing House “Marin Drinov”, Sofia, 23-32. (in Bulgarian)
50. Zidarova, B., I. Peytcheva, A. v. Quadt, N. Zidarov. 2005. Geochemical and Nd-Sr Characteristics of Fluorite from “Chiprovtsi-East”. - In: “Ten Years Central Laboratory of Mineralogy and Crystallography “acad. I. Kostov”, BAS, Acad. Publishing House “Marin Drinov”, Sofia, 103-106. (in Bulgarian)
51. Penev, V., N. Zidarov, B. Zidarova. 2005. Geometrization of the Language of Mineralogy. - In: “Ten Years Central Laboratory of Mineralogy and Crystallography “acad. I. Kostov”, BAS, Acad. Publishing House “Marin Drinov”, Sofia, 123-129. (in Bulgarian)
52. Donchev, I., F. Dipchikov, B. Zidarova, N. Lihareva, N. Zidarov. 2005. Synthesis of a “Synroc” Material with Simulative Additions of Sr, Sm, and Nd and Testing of its Chemical Durability. – In: “Ten Years Central Laboratory of Mineralogy and Crystallography “acad. I. Kostov”, BAS, Acad. Publishing House “Marin Drinov”, Sofia, 151-154. (in Bulgarian)
53. Zidarova, B., N. Zidarov. 2006. Application of Topographic Mineralogy in the Creation of Geological-genetic Models for the Fluorite Mineral Formation in Bulgaria. – In: Theory, History, Philosophy and Practice of the Mineralogy, (Proc. of IV International Mineralogical Seminar), Syktyvkar, Republic Komi, Russian, May 17-20, 114-116.
54. Zidarova, B. 2006. Nanosized Fenomena in Minerals. – Personal Report at the Open Joint Meeting of the National Coordination Council on Innovation and National Coordination Council on Nanotechnology, June 30, BAS, p. 4 (in Bulgarian)
55. Penev, V., N. Zidarov, B. Zidarova. 2007. Geometrization of the Language of Mineralogy. Review of the Basic results. – http://www.acadjournal.com/2007/V20/part2/p1-14/
56. Zidarova, B. P. 2008. Application of the Spectroscopic Methods for Prospection and Evaluation of Raw Fluorite. - In: The World of Minerals, Crystals and Nanostructures, GEOPRINT, issue of the Geology Institute, Syktyvkar, Republic Komi, Scientific Center Ural Department RAS, 244-250. (in Russian with English abstract)
57. Zidarova, B. 2008. Science and Scientific Discovery. – Journal of the Bulgarian Academy of Sciences, Sofia, CXXI, vol. 4, 73-78. (in Bulgarian with English abstract)
58. Zidarova, B. 2008. Scientific Discoveries Made in Bulgaria. – “Science” - Edition of Union of the Bulgarian Scientists, Sofia, XVIII, vol. 5, 30-38 (in Bulgarian with English abstract)
59. Zidarova, B. 2009. Recrystallization of marbles and metasomatic formation of fluorite in hydrothermal conditions from the Mikhalkovo deposit, Central Rhodopes. – Comp. rend. Acad. bulg . Sci., tome 62, no. 10, 1277-1278
60. Zidarova, B. 2010. Hydrothermal fluorite-forming processes in the Mikhalkovo deposit (Central Rhodopes, Bulgaria) – field observation and experimental confirmations. – N. Jb. Miner. Abh., 187, 2, 133-157.
61. Zidarova, B. 2010. Contemporary challenges to the Bulgarian mineralogy. – Mining and Geology, 3-4, 37-41 (in Bulgarian)

Participation in international and national congresses and symposia:


• 4th IAGOD Symposium, September 19-25, 1974, Varna, Bulgaria
• Session of the Presidium of Komi branch AS USSR, August 6, 1981, Syktyvkar, Republic Komi
• 6th IAGOD Symposium, September 6-12, 1982, Tbilisi, Georgia
• XIII congres IМА, September 19-25, 1982, Varna, Bulgaria
• Union symposium "Contemporary technique and methods in the experimental mineralogy", May 18-20, 1983, Chernogolovka, USSR
• Workshop "Recycling of mineral raw materials", may 20, 1985, Varna, Bulgaria
• 7th IAGOD Symposium, August 18-22, 1986, Luleå, Sweden
• Research-practical conference “Modern methods and technologies for search of mineral raw material”, Desember 18-19, 1986, Varna, Bulgaria
• III National Symposium “X-ray diffraction methods”, October 1-3, 1987, Varna, Bulgaria
• First Bulgarian-Greek symposium on geological and physics-geographical problems of the Rhodope massif under the agreement between Sofia University “Kliment Ohridski” and the Aristotle University of Thessaloniki, September 16-19, 1989, Smolyan, Bulgaria (two reports)
• XIV congress KGBA, September, 20-23, 1989, Sofia, Bulgaria
• XV Congress KGBA, September 17-20, 1995, Athens, Greece
• International Symposium-2000 "Mineral diversity - research and preservation", October 6-9, 2000, Earth and Man National Museum, Sofia, Bulgaria
• IVth International Workshop on Nanoscience & Nanotechnology, October 17-19, 2002, Sofia, Bulgaria
• Vth International Workshop on Nanoscience & Nanotechnology, November 17-18, 2003, Sofia, Bulgaria
• “Minerogenesis’2004”, National session in honour of the 90th Jubilee akad. Iv. Kostov, Sofia University “Kliment Ohridski”, January 22-23, 2004, Sofia, Bulgaria (two reports)
• IV International Mineralogical seminar, May 17-20, 2006, Syktyvkar, Republic Komi, Russian
• Invited lecture at the Joint sesion of the National Coordination Council on Innovation and National Coordination Council on Nanotechnology, June 30, 2006, BAS, Sofia, Bulgaria
• Invited lecture of the Joint session on the Presidium of Komi Scientific Center Ural Department RAS and Russian Mineralogical society in honour of the 60th Jubilee corr.-member RAS A. M. Ashabov, August 18, 2008, Syktyvkar, Republic Komi, Russian