Talc | H2Mg3O12Si4 | CID 26924 - PubChem
Talc | H2Mg3O12Si4 | CID 26924 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Talc - Wikipedia
Talc is a trioctahedral layered mineral; its structure is similar to pyrophyllite, but with magnesium in the octahedral sites of the composite layers. [2] The crystal structure of talc is described as TOT, meaning that it is composed of parallel TOT layers weakly bonded to each other by weak van der Waals forces.
Talc Mineral Data
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Foliated - Two dimensional platy forms. Massive - Uniformly indistinguishable crystals forming large masses. Scaly - Morphology like fish scales. Fluorescent, Short UV=orange yellow, Long UV=yellow.
Abstract:This paper gives a comprehensive review about the progress in preparation methods, properties and applications of different synthetic talc natures: i) crystalline nanotalc synthesized by hydrothermal treatment; ii) amorphous and/or short-range order nanotalc obtained by precipitation and iii) organic-inorganic hybrid talc-like str...
The Crystal Structure of Talc | Clays and Clay Minerals - Springer
The crystal structure of a sample of talc from Harford County, Maryland, has been determined by least squares refinement from X-ray diffraction photographs. A triclinic cell with a = 5·293, b = 9·179, c = 9·496Å, α = 90·57°, β = 98·91°, γ = 90·03, space group C1̄ is adopted.
Talc | Definition, Uses, & Facts | Britannica
5 天之前 · Talc, common silicate mineral that is distinguished from almost all other minerals by its extreme softness. Its soapy or greasy feel accounts for the name soapstone given to compact aggregates of talc and other rock-forming minerals. Dense …
Talc - ScienceDirect
1994年1月1日 · In pharmaceutics, talc is used as a glidant for improved powder flow and as a lubricant in tablet formulations. Because of its insolubility, it is employed as a filling and dispensing medium. Talc is also used extensively in the cosmetic industry in face, body, and foot powders, as well as in aerosol formulations.
Talcs - SpringerLink
2015年1月1日 · Pure talc has a trioctahedral crystal structure in which an octahedral brucite [Mg (OH) 2] sheet is sandwiched between two tetrahedral siloxane S 2 O 5 sheets. This structure is electrically neutral and will bond to an adjacent layer only through van der Waals forces. Thus, talc undergoes cleavage very readily, is very soft, and has a soapy feel.
On the crystal structure and compressional behavior of talc
2012年12月6日 · The crystal structure of talc consists of a sheet of linked [MgO 4 (OH) 2] octahedra (“O”) sandwiched between two sheets of SiO 4 tetrahedra (“T”) combined to six-member rings, giving the so-called “T–O–T”-layered structure (Fig. 1). Al or Fe can be present in natural talc (≤2 wt%).
Talc | 14807-96-6 - ChemicalBook
2024年11月1日 · Talc is a mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2. Talc is used in many industries such as paper making, plastic, paint and coatings, rubber, food, electric cable, pharmaceuticals, cosmetics. Uses. talc adds softness and sliding ability to a cosmetic formulation.
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