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Manganese Oxalate
Manganese oxalate is a chemical compound, a salt of manganese and oxalic acid with the chemical formula . The compound creates light pink crystals, does not dissolve in water, and forms crystalline hydrates. It occurs naturally as the mineral Lindbergite. Synthesis Exchange reaction between sodium oxalate and manganese chloride: :\mathsf Physical properties Manganese oxalate forms light pink crystals. It does not dissolve in water, p Ksp= 6.8. Forms crystalline hydrates of the composition MnCO•''n'' HO, where n = 2 and 3. Crystalline hydrate of the composition MnCO•2HO forms light pink crystals of the orthorhombic system, space group ''P''212121, cell parameters a = 0.6262 nm, b = 1.3585 nm, c = 0.6091 nm, Z = 4, melts in its own crystallization water at 100°C. Chemical properties Decomposes on heating: :\mathsf Application *Manganese oxalate is used as an auxiliary siccative An oil drying agent, also known as siccative, is a coordination compound that accelerates ( c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium Oxalate
Magnesium oxalate is an organic compound comprising a magnesium cation with a 2+ charge bonded to an oxalate anion. It has the chemical formula MgCO. Magnesium oxalate is a white solid that comes in two forms: an anhydrous form and a dihydrate form where two water molecules are complexed with the structure. Both forms are practically insoluble in water and are insoluble in organic solutions. Natural occurrence Magnesium oxalate has been found naturally near Mill of Johnston, which is located close to Insch in northeast Scotland. This naturally occurring magnesium oxalate is called glushinskite and occurs at the lichen/rock interface on serpentinite as a creamy white layer mixed in with the hyphae of the lichen fungus. A scanning electron micrograph of samples taken showed that the crystals had a pyramidal structure with both curved and striated faces. The size of these crystals ranged from 2 to 5 μm. Synthesis and reactions Magnesium oxalate can by synthesized by co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manganese Chloride
Manganese(II) chloride is the dichloride salt of manganese, MnCl2. This inorganic chemical exists in the anhydrous form, as well as the dihydrate (MnCl2·2H2O) and tetrahydrate (MnCl2·4H2O), with the tetrahydrate being the most common form. Like many Mn(II) species, these salts are pink, with the paleness of the color being characteristic of transition metal complexes with high spin d5 configurations. Preparation Manganese chloride is produced by treating manganese(IV) oxide with concentrated hydrochloric acid. :MnO2 + 4 HCl → MnCl2 + 2 H2O + Cl2 This reaction was once used for the manufacture of chlorine. By carefully neutralizing the resulting solution with MnCO3, one can selectively precipitate iron salts, which are common impurities in manganese dioxide.. In the laboratory, manganese chloride can be prepared by treating manganese metal or manganese(II) carbonate with hydrochloric acid: :Mn + 2 HCl + 4 H2O → MnCl2(H2O)4 + H2 :MnCO3 + 2 HCl + 3 H2O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Materials Chemistry
The ''Journal of Materials Chemistry'' was a weekly peer-reviewed scientific journal covering the applications, properties and synthesis of new materials. It was established in 1991 and published by the Royal Society of Chemistry. At the end of 2012 the journal was split into three independent journals: '' Journal of Materials Chemistry A'' (energy and sustainability), '' Journal of Materials Chemistry B'' (biology and medicine) and ''Journal of Materials Chemistry C'' (optical, magnetic and electronic devices). The editor-in-chief was Liz Dunn. See also * List of scientific journals in chemistry * ''Soft Matter'' * '' Journal of Materials Chemistry A'' * '' Journal of Materials Chemistry B'' * ''Journal of Materials Chemistry C A journal, from the Old French ''journal'' (meaning "daily"), may refer to: *Bullet journal, a method of personal organization *Diary, a record of what happened over the course of a day or other period *Daybook, also known as a general journal, a ...'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siccative
An oil drying agent, also known as siccative, is a coordination compound that accelerates ( catalyzes) the hardening of drying oils, often as they are used in oil-based paints. This so-called "drying" (actually a chemical reaction that produces an organic plastic) occurs through free-radical chemical crosslinking of the oils. The catalysts promote this free-radical autoxidation of the oils with air. Typical oil drying agents are derived from ions of cobalt, manganese, and iron, prepared as "salts" of lipophilic carboxylic acids such as naphthenic acids, in order to give them a soap-like chemical formula and make them oil-soluble. Varieties of drying agents In technical literature, oil drying agents, such as naphthenates, are described as salts, but they are probably also non-ionic coordination complexes with structures similar to basic zinc acetate. These catalysts were traditionally hydrocarbon carboxylate chelates of lead, but due to lead's toxicity, cobalt and other elements, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Thermal Analysis And Calorimetry
The ''Journal of Thermal Analysis and Calorimetry'' is a peer-reviewed scientific journal published by Springer Science+Business Media in cooperation with Akadémiai Kiadó. Formerly this journal was known as ''Journal of Thermal Analysis''. It publishes papers covering all aspects of calorimetry, thermal analysis, and experimental thermodynamics. Some of the subjects covered are thermogravimetry, differential scanning calorimetry of all types, derivative thermogravimetry, thermal conductivity, thermomechanical analysis, and the theory and instrumentation for thermal analysis and calorimetry. Impact factor The ''Journal of Thermal Analysis and Calorimetry'' had a 2014 impact factor of 2.042, ranking it 37th out of 74 in the subject category 'Analytical Chemistry' and 75th out of 139 in 'Physical Chemistry'. Editor |
Journal Of Solid State Chemistry
The ''Journal of Solid State Chemistry'' is a monthly peer-reviewed scientific journal published by Elsevier. The journal covers the chemical, structural, thermodynamic, electronic, and electromagnetic characteristics and properties of solids, including ceramics and amorphous materials. The editor-in-chief is M.G. Kanatzidis (Northwestern University). Abstracting and indexing This journal is abstracted and indexed by: * BioEngineering Abstracts * Chemical Abstracts Service * Coal Abstracts - International Energy Agency * Current Contents/Physics, Chemical, & Earth Sciences * Engineering Index * Science Abstracts * Science Citation Index According to the ''Journal Citation Reports'', the journal has a 2020 impact factor of 3.498. See also * Solid-state chemistry Solid-state chemistry, also sometimes referred as materials chemistry, is the study of the synthesis, structure, and properties of solid phase materials, particularly, but not necessarily exclusively of, non-mole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Group
In mathematics, physics and chemistry, a space group is the symmetry group of an object in space, usually in three dimensions. The elements of a space group (its symmetry operations) are the rigid transformations of an object that leave it unchanged. In three dimensions, space groups are classified into 219 distinct types, or 230 types if chiral copies are considered distinct. Space groups are discrete cocompact groups of isometries of an oriented Euclidean space in any number of dimensions. In dimensions other than 3, they are sometimes called Bieberbach groups. In crystallography, space groups are also called the crystallographic or Fedorov groups, and represent a description of the symmetry of the crystal. A definitive source regarding 3-dimensional space groups is the ''International Tables for Crystallography'' . History Space groups in 2 dimensions are the 17 wallpaper groups which have been known for several centuries, though the proof that the list was complete was only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orthorhombic System
In crystallography, the orthorhombic crystal system is one of the 7 crystal systems. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors, resulting in a rectangular prism with a rectangular base (''a'' by ''b'') and height (''c''), such that ''a'', ''b'', and ''c'' are distinct. All three bases intersect at 90° angles, so the three lattice vectors remain mutually orthogonal. Bravais lattices There are four orthorhombic Bravais lattices: primitive orthorhombic, base-centered orthorhombic, body-centered orthorhombic, and face-centered orthorhombic. For the base-centered orthorhombic lattice, the primitive cell has the shape of a right rhombic prism;See , row oC, column Primitive, where the cell parameters are given as a1 = a2, α = β = 90° it can be constructed because the two-dimensional centered rectangular base layer can also be described with primitive rhombic axes. Note that the length a of the primiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium Oxalate
Sodium oxalate, or disodium oxalate, is the sodium salt of oxalic acid with the formula Na2C2O4. It is a white, crystalline, odorless solid, that decomposes above 290 °C. Disodium oxalate can act as a reducing agent, and it may be used as a primary standard for standardizing potassium permanganate (KMnO4) solutions. The mineral form of sodium oxalate is natroxalate. It is only very rarely found and restricted to extremely sodic conditions of ultra-alkaline pegmatites. Preparation Sodium oxalate can be prepared through the neutralization of oxalic acid with sodium hydroxide (NaOH) in a 1:2 acid-to-base molar ratio. Evaporation yields the anhydrous oxalateH. W. Foote and John E. Vance (1933), "The system; sodium iodate, sodium oxalate, water". ''American Journal of Science'', series 5, volume 26, issue 151, pages 16-18. that can be thoroughly dried by heating to between 200 and 250 °C. Half-neutralization can be accomplished with NaOH in a 1:1 ratio which produces NaHC2O4, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strontium Oxalate
Strontium oxalate is a compound with the chemical formula SrC2O4. Strontium oxalate can exist either in a hydrated form (SrC2O4•H2O) or as the acidic salt of strontium oxalate (SrC2O4•H2C2O4•H2O). Use in pyrotechnics With the addition of heat, strontium oxalate will decompose based on the following reaction:Kosanke, K"Chemical Components of Fireworks Compositions" Pyrotechnic Chemistry. Whitewater, CO: Journal of Pyrotechnics, 2004. 1-11. : SrC2O4 → SrO + CO2 + CO Strontium oxalate is a good agent for use in pyrotechnics since it decomposes readily with the addition of heat. When it decomposes into strontium oxide, it will produce a red color. Since this reaction produces carbon monoxide, which can undergo a further reduction with magnesium oxide, strontium oxalate is an excellent red color producing agent in the presence of magnesium Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxalic Acid
Oxalic acid is an organic acid with the systematic name ethanedioic acid and formula . It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name comes from the fact that early investigators isolated oxalic acid from flowering plants of the genus ''Oxalis'', commonly known as wood-sorrels. It occurs naturally in many foods. Excessive ingestion of oxalic acid or prolonged skin contact can be dangerous. Oxalic acid has much greater acid strength than acetic acid. It is a reducing agent and its conjugate base, known as oxalate (), is a chelating agent for metal cations. Typically, oxalic acid occurs as the dihydrate with the formula . History The preparation of salts of oxalic acid (crab acid) from plants had been known, at least since 1745, when the Dutch botanist and physician Herman Boerhaave isolated a salt from wood sorrel. By 1773, François Pierre Savary of Fribourg, Switzerland had isolated oxalic acid from i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
