Method for synthesizing iron-containing brucite at high temperature and high pressure

A high temperature and high pressure, brucite technology, applied in the field of high temperature and high pressure research in earth science

Inactive Publication Date: 2018-11-13
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for synthesizing ferric brucite under high temperature and high pressure, so as to solve the problem that the current ferric brucite samples cannot be artificially synthesized

Method used

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Comparison scheme
Effect test

Embodiment 1

[0027] A method for synthesizing iron-containing brucite under high temperature and high pressure, comprising the following steps:

[0028] Step 1, using analytically pure magnesium hydroxide Mg(OH) 2 , analytically pure iron powder Fe and analytically pure iron hydroxide Fe(OH) 3 Grind and mix evenly with a molar ratio of 27:1:2 as the starting material;

[0029] Step 2. Use a tablet press to press the mixture powder in step 1 into a Φ5×2mm cylindrical sample, and take another analytically pure iron powder and press it into two Φ5×1mm iron sheets, and then the cylindrical sample and the iron sheet The sandwich structure of iron sheet-cylindrical sample-iron sheet is put into a Φ5mm, 0.1mm thick platinum buckle for sealing. The iron buckle is placed in the h-BN pipe, and h-BN is used as the pressure transmission medium;

[0030] Step 3. Assemble the h-BN tube containing the sample in step 2 into a high-pressure synthesis assembly block and place it in a six-sided top press ...

Embodiment 2

[0041] A method for synthesizing iron-containing brucite under high temperature and high pressure, comprising the following steps:

[0042] Step 1, using analytically pure magnesium hydroxide Mg(OH) 2 , analytically pure iron powder Fe and analytically pure iron hydroxide Fe(OH) 3 Grind and mix evenly with a molar ratio of 27:1:2 as the starting material;

[0043] Step 2. Use a tablet press to press the mixture powder in step 1 into a Φ5×2mm cylindrical sample, and take another analytically pure iron powder and press it into two Φ5×1mm iron sheets, and then the cylindrical sample and the iron sheet The sandwich structure of iron sheet-cylindrical sample-iron sheet is put into a Φ5mm, 0.1mm thick platinum buckle for sealing. The iron buckle is placed in the h-BN pipe, and h-BN is used as the pressure transmission medium;

[0044]Step 3. Assemble the h-BN tube containing the sample in step 2 into a high-pressure synthesis assembly block and place it in a six-sided top press f...

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Abstract

The invention discloses a method for synthesizing iron-containing brucite at high temperature and high pressure. The method comprises the following steps of using analytically pure magnesium hydroxide, analytically pure iron powder (Fe) and analytically pure iron hydroxide, and uniformly grinding and mixing according to a molar ratio of 27:1:2, so as to obtain a starting raw material; enabling a tabletting machine to tablet the starting raw material into a cylindrical sample; selecting the analytically pure iron powder, and pressing into two iron sheets; then, putting the cylindrical sample and the iron sheets into a platinum snap fastener in a sandwich structure of iron sheet-cylindrical sample-iron sheet, and sealing; finally, loading the platinum snap fastener into an iron snap fastenerand sealing, placing the iron snap fastener into an h-BN (hexagonal boron nitride) tube, and using h-BN as a pressure transfer medium; assembling the h-BN tube into a high-pressure synthesis assemblyblock, placing into a cubic large press, and reacting for 8h at high temperature of 600 to700 DEG C and high pressure of 3 GPa, so as to obtain an iron-containing brucite sample, wherein the iron-containing brucite sample is a single material phase without impurity phase. The method solves the difficult problem of failure to artificially synthesize the existing iron-containing brucite sample.

Description

technical field [0001] The invention relates to the field of high-temperature and high-pressure research of earth sciences, in particular to a method for synthesizing iron-containing brucite under high temperature and high pressure. Background technique [0002] Brucite is one of the most common hydrous minerals in nature. It is a typical low-temperature hydrothermal alteration mineral in serpentinite or dolomite, and its mineral form is a sheet-like or fibrous aggregate. The brucite mineral structure is easily replaced by iron (or manganese) to form iron (or manganese) brucite. Among them, iron-containing brucite has extremely important research value in the field of earth science, and the chemical formula of iron-containing brucite is (Mg 0.9 Fe 0.1 )(OH) 2 . [0003] Experimental studies have shown that traditional nominal anhydrous mafic minerals (such as olivine) often exist in the form of a small amount of structural water in nature, that is, the coordination oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B01J3/06
CPCB01J3/062C01G49/009C01P2002/77
Inventor 梁文李和平尹远李瑞李泽明刘喜强
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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