1. College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
2. Department of Earth Science, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
3. Astromaterials Research and Exploration Science Directorate, NASA, Johnson Space Center, 2101 NASA Parkway, Houston, TX 77058, USA.
4. Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
5. Hitachi High-Technologies, 882 Ichige, Hitachinaka, Ibaraki 312-8504 Japan.
6. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan.
7. Department of Earth and Planetary Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan.