Astron. Astrophys. 363, 1115-1122 (2000)

Acknowledgements

We thank Prof. H. Takei of Osaka University, Prof. M. Ozima of University of Tokyo, Dr. S. Tachibana of Osaka University, Dr. M. Shimobayashi of Kyoto University for preparing diopside crystal, orthoenstatite crystals and enstatite gel used in the present study. We also warmly thank Prof. L.B.F.M. Waters and Dr. F.J. Molster of University of Amsterdam for kindly providing us with their ISO data of NGC 6302, AFGL 4106, HD 100546, and BD + 30369. We are grateful to Dr. F.J. Molster for critical reading of the manuscript and many helpful suggestions. We thank Prof. H. Okuda of ISAS for his continuous encouraging to us in this work and for his careful reading of this paper. This work was supported by the Grant-in-Aid of Japanese Ministry of Education, Science, and Culture (11134210), and ISAS.

© European Southern Observatory (ESO) 2000

Online publication: December 5, 2000
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