This article presents the thermal transitions of a tobermorite-bearing sample when heated from 30°C up to 1200° C, both in vacuum and in static air, including tobermorite transforming to wollastonite, aragonite to calcite and calcite to lime. Characteristics obtained by in situ high temperature X-ray diffraction, field emission scanning electron microscopy and scanning transmission electron microscopy analyses jointly indicate that the investigated tobermorite is anomalous. The variations along the a, b, c axes and the volume changes of tobermorite with increasing temperature are described, and its thermal shrinkage coefficients therefore determined. The comparison between the refined structures at 30°C and 800°C demonstrates that the shrinkage degree (Δa/a₀) along the a axis is higher than those (Δb/b₀, Δc/c₀) along the b and c axes. The wollastonite is formed in two ways: Tobermorite converting to wollastonite and lime reacting with quartz to form wollastonite.

中文翻译：

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通过原位 X 射线衍射测定 11Å 异常雪硅钙石的热行为和加热结构

本文介绍了含雪硅钙石样品在真空和静态空气中从 30°C 加热到 1200°C 时的热转变，包括雪硅钙石转变为硅灰石、文石转变为方解石以及方解石转变为石灰。原位高温X射线衍射、场发射扫描电镜和扫描透射电镜分析得到的特征共同表明所研究的雪硅钙石异常。描述了沿a、b、c轴的变化和雪硅钙石的体积随温度升高的变化，并因此确定了其热收缩系数。30°C 和 800°C 细化结构的比较表明，收缩度（Δa / a ₀ ) 沿a轴高于沿b轴和c轴的那些 (Δ b / b ₀ , Δ c / c ₀ ) 。硅灰石以两种方式形成：雪硅钙石转化为硅灰石和石灰与石英反应形成硅灰石。