Dickite (Al2Si2O5(OH)4) is a phyllosilicate clay mineral named after the metallurgical chemist Allan Brugh Dick, who first described it. It is chemically composed of 20.90% aluminium, 21.76% silicon, 1.56% hydrogen and 55.78% oxygen. It has the same composition as kaolinite, nacrite, and halloysite, but with a … See more In 1888, Allan Brugh Dick (1833–1926), a Scottish metallurgical chemist, was on the island of Anglesey to conduct research on kaolin. He performed various experiments describing the clay mineral. It was not until 1931 that Clarence … See more Al2Si2O5(OH)4 is the chemical formula of dickite. The calculated percent abundances are very close when compared to other kaolin minerals. Chemical … See more Dickite takes on the appearance of a white, brown earthy color and is often found embedded in many other minerals such as quartz. See more Dickite was first discovered in Almwch, Island of Anglesey, Wales, UK. Dickite is scattered across Wales forming occurrences in vein assemblages and as a rock-forming mineral. This area and others where dickite can be found all share similar … See more Dickite has a monoclinic crystal system and its crystal class is domatic (m). This crystal system contains two non-equal axes (a and b) that are … See more WebDickite Al2Si2O5(OH)4 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: m: As pseudohexagonal crystals, to 2 mm, which may be elongated along [100]. As aggregates of platelets resembling books; commonly as compact masses of microscopic crystals. Physical Properties: Cleavage: Perfect on f001g.
Kaolinite-to-dickite reaction in sandstone reservoirs
WebApr 1, 2013 · Kaolin petrography indicates that kaolinite transforms to dickite via dissolution-reprecipitation at depths of -11,000 ft. Dickite has 6~80 values characteristic of modified meteoric water for ... WebMar 14, 2024 · The occurrence of dickite in the gold-bearing rocks of the Witwatersrand system was first reported by Mr. H. C. M. Whiteside. In addition, among the many mineral samples given to me by students of the Witwatersrand Technical College, Johannesburg, were several dickite specimens from mines all along the Witwatersrand area. raytheon doha
Mapping Kaolinite and Dickite in Sandstone Thin Sections
WebJul 30, 2024 · Calcite is Soft and Must Be Tumbled Carefully. Not all stones are equally hard. In fact, some stones are actually quite soft. It probably sounds strange to call a … WebDrilled Tumbled Stone - Crystal Quartz Beads-- Tumbled Crystal Quartz Beads - Tumbled Stone Drilled Side Drilled Bead (WRHS2-S24-04-01) ad vertisement by RockParadise. … WebJul 9, 2024 · Dickite progressively replaced kaolinite within a range of burial depths estimated between about 2500 m and 5000 m. The kaolinite-to-dickite reaction proceeds by gradual structural changes concomitant to crystal coarsening and change from booklet to blocky morphology. The crystallization of dickite proceeds by two distinct paths: (1) … raytheon domino program