1. Akimoto, S., Matsui, Y., Syono, Y.: High-pressure crystal chemistry of orthosilicates and the formation of the mantle transition zone. In: The physics and chemistry of minerals and rocks, Strens, R.G.J. (ed.). New York: John Wiley and Sons, Inc. 1976, pp. 327?363
2. Baur, W.H., Khan, A.A.: Rutile-type compounds. IV. SiO2 and GeO2 and a comparison with other rutile-type structures. Acta Cryst. B27, 2133?2139 (1971)
3. Bell, P.M., Mao, H.K.: Laser optical system for heating experiments and pressure calibration of the diamond-windowed, high-pressure cell. Carnegie Inst. Washington Year Book 74, 399?402 (1975)
4. Burns, R.G.: Partitioning of transition metals in mineral structures of the mantle. In: The physics and chemistry of minerals and rocks, Strens, R.G.J. (ed.). New York: John Wiley and Sons, Inc. 1976, pp. 556?572
5. Cromer, D.T., Liberman, D.: Relativistic calculation of anomalous scattering factors for X-rays. J. Chem. Phys. 53, 1891?1898 (1970)