*Takuo Okuchi1, Narangoo Purevjav1, Norimasa Ozaki2, Yusuke Seto3, Yoshinori Tange4, Toshimori Sekine5, Takeshi Matsuoka6, Kenjiro Takahashi6, Yuichi Inubushi4, Makina Yabashi7, Kazuo Tanaka2, Ryosuke Kodama2,6
(1.Institute for Planetary Materials, Okatama Univ., 2.Faculty of Engineering, Osaka Univ., 3.Faculty of Science, Kobe Univ., 4.JASRI/SPring-8, 5.Faculty of Science, Hiroshima Univ., 6.Photon Pioneers Center, Osaka Univ., 7.RIKEN SPring-8 Center)
Keywords:forsterite, ringwoodite, x-ray free electron laser , laser-driven shock compression, high-speed collision
We analysed time-resolved structure evolution of shock-compressed single crystals of forsterite using power laser and x-ray free electron laser at SACLA, SPring-8. It was indicated from these results that forsterite structure (orthorhombic) transforms into ringwoodite structure (cubic spinel) in very fast time scale of few nanoseconds, which has implication on the origin of ringwoodite observed in meteorites.