Polydymite, Ni Ni2 S4, is a supergene thiospinel sulfide mineral associated with the weathering of primary pentlandite nickel sulfide. Polydymite crystallises in the isometric system, with a hardness of 4.5 to 5.5 and a specific gravity of about 4, is dark violet gray to copper-red, often with verdigris and patina from … See more Polydymite is formed by oxidisation of primary sulfide assemblages in nickel sulfide mineralisation. The process of formation involves oxidation of Ni and Fe which is contained within the primary pentlandite See more Polydymite is reported widely from the oxidised regolith above primary nickel sulfide ore systems worldwide. It is less common than related violarite, due to the high iron content of … See more WebMar 29, 2024 · Poliomyelitis (polio) is a highly infectious viral disease that largely affects children under 5 years of age. The virus is transmitted by person-to-person spread mainly …
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WebNon-insulin-dependent diabetes mellitus (NIDDM, type II diabetes mellitus) is the most common form of diabetes, afflicting 8 to 11 million people in the United States alone.[1-4] Lifestyle, other underlying diseases, and longevity all play key roles in the development of glucose intolerance and NIDDM.[5,6] Rather than the traditional complaints of polyuria, … simply owners holiday cottages
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WebApr 4, 2024 · disease, any harmful deviation from the normal structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from physical injury. A diseased organism commonly exhibits signs or symptoms indicative of its abnormal state. Thus, the normal condition of an organism must be understood in … Webpolydymite: [noun] a mineral Ni4S5 consisting of a nickel sulfide that is isomorphous with linnaeite, siegenite, carrollite, and violarite. WebAug 19, 2006 · This is in tune with the crystal structure of polydymite in which the Ni(II) is present both in octahedral and tetrahedral sites. Key Words: polydymite electron probe microanalysis optical absorption electronic transitions crystal field parameter Ni(II) infrared spectrum molecular vibration. simply owners koroni