terndrite

Terndrite is a hypothetical mineral species that was proposed in 2018 by a team of researchers led by Dr. Robert Downs of the Carnegie Institution for Science. The name "terndrite" is derived from the Latin word "terndus," meaning "torn" or "ragged," reflecting the irregular and fragmented nature of the mineral's structure.

The proposed mineral is based on experimental data from high-pressure, high-temperature conditions, which are similar to those found in subduction zones and mantle plumes. Terndrite is predicted to form from the reaction between iron-rich perovskite and magnesium oxide, releasing oxygen gas and forming a new mineral phase.

The crystal structure of terndrite is expected to be orthorhombic, with a space group of Pnma. It is predicted to have a density of approximately 5.5 g/cm³ and a hardness of about 6.5 on the Mohs scale. Terndrite is expected to be magnetic, with a Curie temperature of around 573 K.

The discovery of terndrite is significant because it challenges the traditional view of mineral stability in the Earth's mantle. It suggests that minerals can exist in metastable states under certain conditions, and that the mineralogy of the mantle may be more complex than previously thought.

However, the existence of terndrite remains unconfirmed and is considered a hypothesis. Further experimental and theoretical work is needed to validate the mineral's existence and to better understand its properties and stability. As of now, terndrite is not recognized as a valid mineral species by the International Mineralogical Association.