Preparation method of high-titanium and high-water-content magnesium fayalite single crystal

Abstract

The invention discloses a preparation method of a high-titanium and high-water-content magnesium fayalite single crystal. The method comprises the following steps: preparing a mixture cylinder sample by taking solid magnesium nitrate hexahydrate powder, solid ferric nitrate nonahydrate (III) powder, liquid tetraethyl orthosilicate and liquid tetrabutyl titanate as initial raw materials according to the stoichiometry of magnesium fayalite; preparing a talc and brucite mixture water source round sheet with a weight ratio of 10: 1 by taking solid natural talc powder and solid natural brucite powder as starting raw materials; placing the water source round sheet at two ends of the mixture cylinder sample; and putting the mixture cylinder sample and the water source round sheet into a gold-palladium alloy sample tube, and carrying out high-temperature and high-pressure reaction to prepare high-titanium and high-water-content magnesium fayalite single crystals. According to the invention, the technical blank of preparation of high-titanium and high-water-content Mars mantle magnesium fayalite at present is solved, and a large-particle high-titanium and high-water-content magnesium fayalite single crystal experimental sample is obtained.

Description

technical field [0001] The invention belongs to the technical field of synthesis of mineral single crystal samples under high temperature and high pressure conditions, and in particular relates to a preparation method of ferroolivine single crystal with high titanium content and high water content. Background technique [0002] With the rapid development of human science and the continuous innovation of technology, many countries in the world have set off an upsurge in deep space exploration; human beings have greatly improved the formation of Mars' internal matter, sphere structure and evolution history. Previous studies on the internal structure of Mars have shown that the interior of Mars has a layered structure: Martian crust (refers to the depth of Mars from the surface to 60km, corresponding pressure and temperature: 0-0.6GPa and 210-366K), Martian mantle (refers to The inner depth of Mars is from 60km to 1596km, the corresponding pressure and temperature: 0.6GPa-19GPa...

AI Technical Summary

Problems solved by technology

[0005] In summary, whether the natural olivine is collected from the natural olivine in the upper mantle of the earth (containing 50ppm wt% of titanium and containing 100-200ppm wt% of water), or adopting the natural olivine of the upper mantle of the moon (containing 2000-3000ppm wt% Titanium and anhydrous), or the experimental samples of titanium-containing olivine (containing <2100ppm wt% titanium and containing <1000ppmwt% water) synthesized by the prior art laboratory cannot meet the requirements of the Martian mantle forsterite (containing 3000-4000ppm wt% of titanium and 2000-3000ppm wt% of water) meet the scientific research needs of various high-temperature and high-pressure laboratory simulations, so we need to invent a preparation of a high-titanium and high-water-containing forsterite single crystal method