2012年1月1日 · The structure of dickite (general formula Al 2 Si 2 O 5 (OH) 4) belongs to the monoclinic space group Cc with the vacant cavity alternating in adjacent layers between B and C sites (Newnham, 1960). Symmetry requirements are met by placing the vacant cavity at the trans -site ( Bailey, 1963 ).

Furthermore, the surface of dickite, which is rich in -OH and Si O groups, could simultaneously form hydrogen bonds with PAM and DAAM, thus acting as an inorganic crosslinking agent. After expansion treatment, the dickite layers were fully exposed, increasing the specific surface area and further enhancing the physical crosslinking effect of ...

2022年3月15日 · The case of dickite to HP-dickite is easier to interpret, because according to PBE HP-dickite becomes the stable polytype when pressure is about 2.2 GPa. This result is in good agreement with the experimental observations of Dera et al. (2003), which indicate above 2 GPa dickite transforms to HP-dickite.

1973年1月1日 · Dickite has a layered monoclinic cell and nacrite has a 6-layered monoclinic cell. Nacrite, the rarest of the kaolinite minerals, probably forms only by hydrothermal activity. Dickite is formed by hydrothermal solutions and occurs quite commonly as secondary clay in the pores of sandstones; it also occurs in coal beds and in geodes.

2018年10月1日 · Dickite sample was heated from ambient temperature (27 °C) up to 1200 °C in 50 °C interval with a rate of 5 °C/min and 2 min waiting time for thermal equilibration before collecting data. The non-hydrogen structure of dickite was refined in space group Cc using powder diffraction data and Rietveld refinement method.

2024年12月1日 · However, dickite, which is also a 1:1 clay mineral, is structurally similar to kaolinite and has a higher degree of crystallinity than kaolinite (Guggenheim et al., 2007). Studies in recent years have shown that organic molecules with chemical polarity tend to be more easily intercalated into the interlayers of dickite for intercalation and ...

1973年1月1日 · Dickite has a layered monoclinic cell and nacrite has a 6-layered monoclinic cell. Nacrite, the rarest of the kaolinite minerals, probably forms only by hydrothermal activity. Dickite is formed by hydrothermal solutions and occurs quite commonly as secondary clay in the pores of sandstones; it also occurs in coal beds and in geodes.

2001年2月1日 · Dickite from St. Claire, Pennsylvania, was purchased from Ward's Natural Science Establishment, Rochester, New York. Step-scan heating of dickite from 200°C to 1300°C at 100°C intervals was done using a Linkam, TMS 93 heating stage placed on line under the Raman microprobe.

Dickite (Al 2 Si 2 O 5 (OH) 4), an aluminosilicate clay mineral with a 1:1 layered structure, consists of silicon‑oxygen tetrahedral sheets and aluminum‑oxygen octahedral sheets (Yan and Wang, 2018). The interlayer of dickite is connected by hydrogen bonds, allowing small molecules to insert between the layers, thereby increasing the ...

2024年12月1日 · When dickite was added to the electrode surface coating, the t Zn 2 + of the median value of D Zn electrode increased to 0.59. This increase was attributed to the negative surface charge of dickite, which enhanced Zn 2+ adsorption sites and promoted Zn 2+ concentration near these sites, creating an “ion pool”.