Fellowships of Prestigious Academies
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1984 Elected as Fellow, Indian National Science Academy (INSA), New Delhi
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1989 Elected as Fellow, National Academy of Sciences' India, Allahabad
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2012 Elected as Foreign Member, Russian Academy of Sciences
Prestigious International and National Positions
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2016-2019 Co-Chair IAP for Science, the Global Network of Science Academies
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2019-2022 Re-elected Co-Chair IAP for Science, the Global Network of Science Academies
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2014-2016 President, the Association of Academies and Societies of Sciences in Asia (AASSA)
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2011-2013 President, Indian National Science Academy (INSA), New Delhi
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2006-2010 President, ICSU-CODATA
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1996-2003 Editor, Zeitschrift für Kristallographie
Honours and Awards
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1996 DS Kothari Memorial Lecture (INSA)
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2014 Honoured by Prime Minister of India during Inaugural Session of Indian Science Congress Session
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2013-2014 Member, External Review Panel of International Council for Science (ICSU), now rechristened as ICS
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2010 INSA Jawaharlal Birth Centenary Visiting Fellowship
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2007 S. K. Mitra Birth Centenary Gold Medal of Indian Science Congress Association
Honorary Positions
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Honorary Professor, Indian Institute of Technology (IIT), Kanpur, Honorary Professor for Life, University of Delhi, Delhi and Visiting Professor, Panjab University, Chandigarh.
Prestigious positions abroad
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IBM India Fellow, Thomas J. Watson Research Centre, New York; Visiting Professor, Univ. of Tokyo, Technical Univ. Darmstadt, and Sr. Visiting Scientist at PTB, Braunschweig.