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What is cordierite

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  • Time of issue:2020-08-04 17:40
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(Summary description)Cordierite is a silicate mineral, usually light blue or light purple, glassy luster, transparent to translucent [1]. Cordierite also has a characteristic, with obvious pleochroism (trichromaticity), emitting light of different colors in different directions. The cordierite of Pinyosime is regarded as a gemstone. In addition, cordierite is widely used as a honeycomb carrier material for automobile purifiers due to its good fire resistance and low thermal expansion rate. Cordierite is produced in schist, gneiss and altered igneous rock. Therefore, people also call cordierite dichroic stone. Magnesium cordierite can be synthesized artificially and used for refractory materials

What is cordierite

(Summary description)Cordierite is a silicate mineral, usually light blue or light purple, glassy luster, transparent to translucent [1]. Cordierite also has a characteristic, with obvious pleochroism (trichromaticity), emitting light of different colors in different directions. The cordierite of Pinyosime is regarded as a gemstone. In addition, cordierite is widely used as a honeycomb carrier material for automobile purifiers due to its good fire resistance and low thermal expansion rate. Cordierite is produced in schist, gneiss and altered igneous rock. Therefore, people also call cordierite dichroic stone. Magnesium cordierite can be synthesized artificially and used for refractory materials

  • Categories:Trade News
  • Author:
  • Origin:
  • Time of issue:2020-08-04 17:40
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Information

Cordierite is a silicate mineral, usually light blue or light purple, glassy luster, transparent to translucent [1]. Cordierite also has a characteristic, with obvious pleochroism (trichromaticity), emitting light of different colors in different directions. The cordierite of Pinyosime is regarded as a gemstone. In addition, cordierite is widely used as a honeycomb carrier material for automobile purifiers due to its good fire resistance and low thermal expansion rate. Cordierite is produced in schist, gneiss and altered igneous rock. Therefore, people also call cordierite dichroic stone. Magnesium cordierite can be synthesized artificially and used for refractory materials.

Industrial characteristics

【Molecular formula】(Mg,Fe)2Al3[AlSi5O18]

[Chemical composition] In the composition, Mg and Fe are completely isomorphic, but most cordierite is rich in magnesium, because in the cordierite crystal structure, Mg and Fe are coordinated four times, and the radius of Mg2+ is larger than that of Fe2+. Small, more stable into the tetrahedron. Al3+ outside the backbone can be replaced by Fe3+. In addition, the ingredients often contain H2O, K, Na, etc., in the large pores in the structure.

[Crystal structure] Orthrhombic system; D202h-Cccm, a0=1.713~1.707 nm, b0=0.980~0.973 nm, c0=0.935~0.929 nm, Z=4. It has the same structure as beryl, but there is Al→Si in the hexagonal ring, so the symmetry decreases. It is worth pointing out that Mg2+ and Fe2+ are generally coordinated six times, but in cordierite they are coordinated four times.

[Form] Intact crystals do not appear often, sometimes in the form of pseudo-hexagonal crystals.

[Physical properties] Colorless, or light blue, light yellow; glass luster; transparent to translucent. Cleavage {010} medium; conchoidal fracture. Hardness 7~7.5. The relative density is 2.53~2.78.

[Genesis and Occurrence] is a typical metamorphic mineral, produced in gneiss, chip rock and altered igneous rock.

[Main application] Cordierite's biggest characteristic is its low thermal expansion coefficient, so it is widely used in ceramics and glass industries to improve its ability to resist rapid cold and heat.

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