作者在最近(1979)的有关低温合成锐钛矿(TiO_2)的文章中,把注意力集中在Walker等(1969)所进行的矿物学观察上。据报导,两种土壤样品之间矿物学上有差异,其中一种取自具有连续植被地区,另一种则取自邻近的无植被地区。Walker等研究了夏威夷群岛之一的基性熔岩区域上发育的同一砖红壤性土壤样品。取自有植被地区的土壤样品内含有非晶态钛的水合物和氧化铁。另一些样品是从贫瘠 In a recent article (1979) on the synthesis of anatase (TiO 2) at low temperatures, the authors focused their attention on the mineralogical observations conducted by Walker et al. (1969). It has been reported that there is a mineralogical difference between the two soil samples, one of which is taken from areas with continuous vegetation and the other from nearby no-vegetation areas. Walker et al. Studied the same brick loamy soil sample developed on a basal lava area of ​​one of the Hawaiian islands. Soil samples taken from areas with vegetation contained amorphous titanium hydrate and iron oxide. Other samples are from barren