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- W4383223486 abstract "Abstract The study on the origin of quartz and silica in Xuanwei Formation coal in Northwest Yunnan, China, is helpful to understand the relationship between quartz and silica and the high incidence of lung cancer from the root. To address these questions, the mineralogy and microscopic studies of silica in Xuanwei Formation coal were performed. The following results were obtained: (1) silica in the late Permian Xuanwei Formation coal seams originated from detrital input, early diagenesis, and late diagenesis. (2) A more significant contribution comes from early diagenesis, which contains abundant authigenic quartz and amorphous silica. (3) Quartz and silica from inorganic silicon are more symbiotic with kaolinite and from biogenic silicon with chamosite. (4) Three silica polymorphs in coal samples have been identified: opal-A (amorphous silica), opal-CT/-C (cristobalite/tridymite), and α quartz. (5) Opal-A is ubiquitous, while opal-CT/-C and α quartz are rare. (5) Opal-A is an amorphous and nontoxic ordinary silica." @default.
- W4383223486 created "2023-07-06" @default.
- W4383223486 creator A5012959343 @default.
- W4383223486 creator A5019716362 @default.
- W4383223486 creator A5039811395 @default.
- W4383223486 creator A5059971547 @default.
- W4383223486 creator A5063194993 @default.
- W4383223486 date "2023-07-05" @default.
- W4383223486 modified "2023-10-16" @default.
- W4383223486 title "Origin and environmental significance of crystalline quartz and amorphous silica in Xuanwei Formation coal, China" @default.
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