Science

Süleymaniye Mosque, Istanbul, Turkey

Süleymaniye Mosque, Istanbul, Turkey

One of the most significant cultural heritage buildings situated on the Third Hill of Istanbul, Turkey, is the Süleymaniye Mosque (Turkish: Süleymaniye Camii, Turkish pronunciation: sylejˈmaːnije). It is the largest in the city of Istanbul and also boasts of one of the best-known panoramas in.....

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Mottramite: Properties and Occurrences

Mottramite: Properties and Occurrences

Mottramite is hydrous vanadate of lead and copper occurring as a crystalline incrustation of a velvet-black color on sandstone at Mottram in Cheshire, England. It is an orthorhombic anhydrous vanadate hydroxide mineral, PbCu(VO4)(OH), at the copper end of the descloizite subgroup. It is a mineral.....

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Rhodite – a naturally occurring alloy of gold

Rhodite – a naturally occurring alloy of gold

Rhodite is a mineral consisting of a native alloy of rhodium and gold. It is also known as, rhodian gold, is a naturally occurring alloy of gold and rhodium found in gold ore. It is a relatively unknown precious metal, possibly due to its global demand being concentrated in auto-catalysts, where .....

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Bowieite – a rhodium-iridium-platinum sulfide mineral

Bowieite – a rhodium-iridium-platinum sulfide mineral

Bowieite is a rhodium-iridium-platinum sulfide mineral (Rh, Ir, Pt)2S3, found in platinum-alloy nuggets from Goodnews Bay, Alaska. It is a rhodium-iridium-platinum sulfide mineral. After gold, Bowieite is one of the most expensive metals. Most of this expense is driven by the fact that it’s.....

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Wilkinson’s Catalyst

Wilkinson’s Catalyst

Wilkinson’s Catalyst Wilkinson’s catalyst is a pre-catalyst that is converted to an active form by losing one triphenylphosphine ligand before entering the catalytic cycle. It is the common name for chloridotris (triphenylphosphine)rhodium(I), a coordination complex of rhodium with th.....

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Carbene (Definition, Structure, Uses)

Carbene (Definition, Structure, Uses)

In chemistry, a carbene (H2C) any member of a class of highly reactive molecules containing divalent atoms of carbon is a carbon atom that uses only two of the four bonds they are able to form with other atoms. The general formula is R-(C:)-R ‘or R=C: where substituents or hydrogen atoms ar.....

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Jolo Island, Philippines

Jolo Island, Philippines

Island and town of Jolo (Tausūg: Sūg) in the southwestern Philippines; it is a volcanic island and is the largest island in the province of Sulu, where the capital of the same name is located. It is situated between Borneo and Mindanao in the Sulu Archipelago and has a population of approximate.....

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Vanadium carbide – a hard refractory ceramic material

Vanadium carbide – a hard refractory ceramic material

Vanadium carbide is the inorganic compound with the formula VC. It is an extremely hard refractory ceramic material. With a hardness of 9-9.5 Mohs, it is possibly the hardest metal-carbide known. Vanadium carbide (VC) coating technology provides a superior protective coating for steel surfaces an.....

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Ytterbium dirhodium disilicide – a heavy fermion solid state compound

Ytterbium dirhodium disilicide – a heavy fermion solid state compound

Ytterbium is a chemical element, a rare-earth metal of the lanthanide series of the periodic table. Ytterbium dirhodium disilicide (YbRh2Si2) is a heavy-fermion solid-state compound of ytterbium, rhodium, and silicon. It slowly oxidizes in air, forming YbO3; the metal is readily dissolved in dilu.....

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Rhodium (III) Oxide – an inorganic compound

Rhodium (III) Oxide – an inorganic compound

Rhodium(III) oxide (or Rhodium sesquioxide) is the inorganic compound with the formula Rh2O3. It is a dark grey odorless powder, insoluble in water, with catalytic properties. Oxide compounds are not conductive to electricity. It is a gray solid that is insoluble in ordinary solvents. Rhodium Oxi.....

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Isomerism (Definition, Types)

Isomerism (Definition, Types)

Isomerism is a process in which two or more compounds have the same chemical formula, but various structural formulas and distinct properties are available. Chemical compounds that have similar chemical formulas but vary in properties are called isomers and the arrangement of atoms in the molecul.....

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Rhodium (III) sulfide – an inorganic compound

Rhodium (III) sulfide – an inorganic compound

Rhodium (III) sulfide is the inorganic compound with the formula Rh2S3. It is a moderately water and acid soluble Rhodium source for uses compatible with sulfates. It is an insoluble black solid, prepared by heating a mixture of elemental rhodium and sulfur. It is a red crystal that forms a hydra.....

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