The research showed that boiler scale was composed of aragonite and calcite, which were of the same chemical formula CaCO3 and their ratio is 92.8% and 7.2% relatively.

• 研究发现，家用热水壶水垢化学成分主要为碳酸钙，矿物物相主要由文石和方解石组成，以文石相为主，质量占92.；8%25，方解石占7