Sharygin, Victor V. and Yakovlev, Grigory A. and Wirth, Richard and Seryotkin, Yurii V. and Sokol, Ellina V. and Nigmatulina, Elena N. and Karmanov, Nikolai S. and Pautov, Leonid A.·CC BY 4.0·Wikimedia
Склад
Composizione (% in peso)
O
Ca
Ti
Fe
- OOxygen34.1%
- CaCalcium31.1%
- TiTitanium18.6%
- FeIron10.8%
- SiSilicon5.4%