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一、前言硅灰石是具有多种变体的钙质偏硅酸盐(CaSiO_3)矿物。在自然界常温常压下稳定的只有低温变体中的三斜和单斜硅灰石,而硅灰石的高温变体仅见于人工合成和煤层地下燃烧的产物中。天然纯硅灰石(CaO48.3％和SiO_251.7％)甚为少见。由于它与钙蔷薇辉石的晶格相似,所以常受到Fe、Mn、Ti等杂质的混染、从而使其在工业上的应用受到很大的限制。
I. Preface Wollastonite is a calcareous metasilicate (CaSiO 3) mineral with many variations. In nature, only triclinic and monoclinic wollastonite in the low-temperature variant are stable at normal temperature and pressure, whereas the high-temperature variants of wollastonite are found only in the products of artificial synthesis and underground combustion of the coal seam. Natural pure wollastonite (CaO48.3% and SiO2251.7%) is very rare. Because it is similar to the crystal lattice of calcium rose pyroxene, it is often contaminated by Fe, Mn, Ti and other impurities, so that its industrial application is greatly restricted.