xifengite

例句：

1. 1. The new concrete mix contains a significant amount of xifengite to improve its strength and durability.
   新的混凝土混合物含有大量硅灰石，以增强其强度和耐久性。
2. 2.Xifengite is often used as a filler in cement to enhance its properties.
   硅灰石常作为水泥的填料，以增强其性能。
3. 3. Due to its high thermal conductivity, xifengite has been widely used in thermal insulation materials.
   由于其高热导率，硅灰石被广泛应用于隔热材料中。