Fibrous Thiosilicates And Their Crystal Chemical Analogs: Considerations As Infrared Materials

William B. White; George Veni; Sarah Steele; Diane S. Knight

doi:10.1117/12.936423

19 December 1986 Fibrous Thiosilicates And Their Crystal Chemical Analogs: Considerations As Infrared Materials

William B. White, George Veni, Sarah Steele, Diane S. Knight

Proceedings Volume 0683, Infrared and Optical Transmitting Materials; (1986) https://doi.org/10.1117/12.936423
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

Materials with high toughness often have fibrous microstructures or are made as fibrous composites. One possible route to new infrared-transmitting materials is through sulfide analogs of those silicates known to have fibrous structures. SiS2 itself occurs as fibrous crystals isostructural with the rare oxide polymorph, silica-W. However, it is extremely reactive with oxygen and water. An investigation is underway of compound formation in the systems CaS-SiS2, MgS-SiS2, and NaS-Al2S3-SiS2 to search for such fibrous silicate analogs as CaSiS3 (thiowollastonite), MgSiS3 (thioenstatite), CaMgSi2S6 (thiodiopside), and NaA1Si2S6 (thiojadeite). A second phase of the investigation is to construct crystal chemical analogs with less chemical reactivity: e.g. Ge for Si, rare earths for Al, and the larger alkaline earths (Ba, Sr) for the more reactive smaller ones (Ca, Mg).

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William B. White, George Veni, Sarah Steele, and Diane S. Knight "Fibrous Thiosilicates And Their Crystal Chemical Analogs: Considerations As Infrared Materials", Proc. SPIE 0683, Infrared and Optical Transmitting Materials, (19 December 1986); https://doi.org/10.1117/12.936423

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