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Method for synthesizing barium-manganese carbonate monocrystal under high temperature and high pressure

A kind of barium manganese carbonate powder crystal, high temperature and high pressure technology, applied in the field of high temperature and high pressure research in earth science

Inactive Publication Date: 2018-10-12
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for synthesizing barium manganese carbonate single crystals under high temperature and high pressure, so as to solve the problem that barium manganese carbonate single crystal samples cannot be artificially synthesized

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for synthesizing barium manganese carbonate single crystal under high temperature and high pressure, comprising the following steps:

[0032] Step 1, use analytically pure barium carbonate and analytically pure manganese carbonate to grind and mix uniformly as starting raw materials with a molar ratio of 1:1;

[0033] Step 2. Use a tablet press to press the mixture powder in step 1, about 0.25g, into a cylindrical shape of Φ5×3mm, then wrap it with gold foil to make a sample, put the prepared sample in an h-BN tube, and press h -BN is the pressure transmission medium;

[0034] 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 for high-temperature and high-pressure reaction. The temperature of the high-temperature and high-pressure reaction is 700°C and the pressure is 1GPa. The time is 12h;

[0035] Step 4, taking out the reacted sample in step 3, peeling off the ...

Embodiment 2

[0046] A method for synthesizing barium manganese carbonate single crystal under high temperature and high pressure, comprising the following steps:

[0047] Step 1, use analytically pure barium carbonate and analytically pure manganese carbonate to grind and mix uniformly as starting raw materials with a molar ratio of 1:1;

[0048] Step 2. Use a tablet press to press the mixture powder in step 1, about 0.25g, into a cylindrical shape of Φ5×3mm, then wrap it with gold foil to make a sample, put the prepared sample in an h-BN tube, and press h -BN is the pressure transmission medium;

[0049] 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 for high-temperature and high-pressure reaction. The temperature of the high-temperature and high-pressure reaction is 800°C and the pressure is 2GPa. The time is 12h;

[0050] Step 4, taking out the reacted sample in step 3, peeling off the go...

Embodiment 3

[0061] A method for synthesizing barium manganese carbonate single crystal under high temperature and high pressure, comprising the following steps:

[0062] Step 1, use analytically pure barium carbonate and analytically pure manganese carbonate to grind and mix uniformly as starting raw materials with a molar ratio of 1:1;

[0063] Step 2. Use a tablet press to press the mixture powder in step 1, about 0.25g, into a cylindrical shape of Φ5×3mm, then wrap it with gold foil to make a sample, put the prepared sample in an h-BN tube, and press h -BN is the pressure transmission medium;

[0064] 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 for high-temperature and high-pressure reaction. The temperature of the high-temperature and high-pressure reaction is 900°C and the pressure is 3GPa. The time is 12h;

[0065] Step 4, taking out the reacted sample in step 3, peeling off the ...

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Abstract

The invention discloses a method for synthesizing barium-manganese carbonate monocrystal under high temperature and high pressure. The method comprises the following steps of uniformly grinding and mixing analytically pure barium carbonate and analytically pure manganese carbonate according to a molar ratio of 1:1, so as to obtain an initial raw material; reacting for 12h at high temperature of 700 to 900 DEG C and high pressure of 1 to 3GPa, so as to obtain a sample of barium-manganese carbonate powder crystal; grinding and mixing the sample of the barium-manganese carbonate powder crystal and anhydrous oxalic acid according to a molar ratio of 1:0.1, so as to obtain a sample; reacting for 100h at high temperature of 700 to 900 DEG C and high pressure of 3GPa, so as to obtain the sample of the barium-manganese carbonate monocrystal. The high-temperature and high-pressure method has the advantages that the operation process is simple, the experiment conditions are easy to control, andthe like. The obtained barium-manganese carbonate sample has the characteristics that the purity is high, the crystallizing degree is high, the chemical stability is good, the easiness in water absorbing is avoided, and the like; the technical problem of lack of growth method in the existing artificially synthesized barium-manganese carbonate monocrystal is solved.

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 barium manganese carbonate single crystals under high temperature and high pressure. Background technique [0002] In recent years, with the widespread concern of the protection of the earth's environment, the study of the structure and properties of carbonate minerals has become an important topic for exploring the earth's carbon storage, carbon cycle, greenhouse effect and fuel energy. Studies have shown that in addition to traditional calcite-type carbonate minerals, there are also double-carbonate minerals rich in heavy metal elements in nature, and their thermal stability and acid corrosion are important for the cycle of heavy metal elements on the earth's surface and the protection of environmental pollution, etc. The problem has extremely important research value. Compared with the simple crystal struct...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B1/12C30B1/10
CPCC30B1/10C30B1/12C30B29/10
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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