T/ZJATA 0003-2020 The evaluation, grading, and naming of Taishun stone

Scope

Scope: This document specifies the terms and definitions, identification characteristics, identification methods, grading requirements, and identification grading certificates (or reports) for Taishun stone. This document is applicable to the production, trade, and quality evaluation of Taishun stone raw materials and crafts from the jade-producing areas in Taishun County, Zhejiang Province, which are composed of phlogopite, illite (sericite), and diopside. Main technical content: This standard covers the identification and grading naming methods for Taishun stone, including terms and definitions, identification characteristics, identification methods, grading requirements, and identification grading certificates, filling the void in the standard for identification methods and classification naming methods for Taishun stone. By using the characteristic infrared absorption spectral bands caused by the vibration of Si-O groups in clay minerals in the infrared fingerprint region and the characteristic infrared absorption spectral bands caused by the vibration of OH groups in the functional group region, an infrared spectroscopy analysis method suitable for phlogopite-type, illite-phlogopite-type, and diopside-type Taishun stone was established. And based on X-ray diffraction phase analysis spectrogram technology, the analysis of the mineral composition of Taishun stone was verified. This improves the accuracy and reproducibility of identification results, while featuring clear descriptions of characteristics with pictures and texts, and strong adaptability.

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