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A kind of high temperature and high pressure synthesis of trigonal strontium calcium carbonate srca (co 3 ) 2 Methods

A technology of high temperature and high pressure synthesis, strontium calcium carbonate, applied in the field of earth science mineralogy research, can solve problems such as the lack of end member phases

Active Publication Date: 2022-07-29
GUIZHOU EDUCATION UNIV +1
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Problems solved by technology

It is speculated that the strontium carbonate ore SrCO 3 The formed strontium-containing trigonal dicarbonate system SrMg(CO 3 ) 2 -SrFe(CO 3 ) 2 -SrMn(CO 3 ) 2 -Tripartite SrCa(CO 3 ) 2 , however only the tripartite SrMg(CO 3 ) 2 One endmember phase and all other endmember phases are absent

Method used

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Embodiment

[0018] A high temperature and high pressure synthesis of trigonal strontium calcium carbonate SrCa(CO 3 ) 2 method, including the following steps:

[0019] Step 1. Use analytically pure strontium carbonate SrCO 3 and analytically pure calcium carbonate CaCO 3 Take the molar ratio of 1:1 to grind and mix uniformly as the starting material;

[0020] Step 2. Use a tablet press to press the mixture powder in step 1 into a Φ5×3mm cylindrical shape, wrap the cylindrical sample with 0.02mm thick gold foil and place it in a h-BN tube as a sample, using h-BN as the pressure transmission medium;

[0021] Step 3. Assemble the h-BN tube containing the sample in step 2 in a high-pressure synthesis assembly block and place it in a six-sided top large press for high-temperature and high-pressure reaction. The high-temperature and high-pressure reaction conditions are 0.5GPa, 700 ° C, and keep After quenching under pressure and holding for 6 hours, the pressure is quickly released to nor...

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Abstract

The invention discloses and provides a high-temperature and high-pressure synthetic trigonal strontium calcium carbonate SrCa(CO 3 ) 2 method using analytically pure strontium carbonate SrCO 3 and analytically pure calcium carbonate CaCO 3 The trigonal strontium calcium carbonate Sr(CO 3 ) 2 . The high temperature and high pressure reaction conditions are 0.5GPa, 700°C, and quenching after maintaining pressure and heat preservation for 6h. The first synthesis of strontium calcium carbonate SrCa (CO 3 ) 2 The trigonal phase is proved to exist stably and the boundary conditions of temperature and pressure are given, which solves the technical problems of current mineralogical research.

Description

technical field [0001] The invention relates to the research field of earth science mineralogy, and relates to a high-temperature and high-pressure synthetic trigonal strontium calcium carbonate SrCa(CO 3 ) 2 Methods. Background technique [0002] Carbonate minerals are widely distributed on the earth. According to the structure-component classification, simple carbonate minerals are divided into calcite type and aragonite type: calcite type The main four end members are magnesite MgCO 3 , siderite FeCO 3 , Rhodochrosite MnCO 3 and calcite CaCO 3 Composition; Aragonite-type main four-terminal element is composed of aragonite CaCO 3 , strontium carbonate ore SrCO 3 , white lead ore PbCO 3 And poison barite BaCO 3 constitute. Under complex geological conditions such as sedimentation and metamorphism, calcite-type and aragonite-type carbonates can form composite bicarbonates with more complex structures. At present, the poison barite BaCO 3 The formed barium-containi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
CPCC01F11/18C01P2006/66C01P2006/80
Inventor 牛延慧梁文孟勇徐海丽
Owner GUIZHOU EDUCATION UNIV
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