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List Of Minerals Recognized By The International Mineralogical Association (T)
__TOC__ T Ta – Te # Tacharanite (Y: 1961) 9.HA.7 # (Y: 1856) 3.BB.3 (IUPAC: calcium dimagnesium hexachloride dodecahydrate) # Tadzhikite-(Ce) (hellandite: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turquoise Polie 1 (USA)
Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminium, with the chemical formula . It is rare and valuable in finer grades and has been prized as a gemstone and ornamental stone for thousands of years owing to its unique hue. Like most other opaque gems, turquoise has been devalued by the introduction of treatments, imitations and synthetics into the market. The robin's egg blue or sky blue color of the Persian turquoise mined near the modern city of Nishapur in Iran has been used as a guiding reference for evaluating turquoise quality. Names The word ''turquoise'' dates to the 17th century and is derived from the French ''turquois'' meaning "Turkish" because the mineral was first brought to Europe through the Ottoman Empire.Turquoise . minerals.usgs.gov Howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taikanite
Taikanite is a silicate mineral. It was named after the Taikan Range, Russia, its type locality. Properties Taikanite is a mineral with a color that ranges from emerald green to blackish-green. It crystallizes in the monoclinic system. It has a high relative density of 4.72. The mineral has a hardness of 6 to 7. Occurrence The type locality is the Taikan Range, in the Khabarovsk Krai, Russian Far East, where the mineral was discovered in a manganese deposit. It has also been found in Hotazel, Northern Cape province, South Africa. See also *List of minerals recognized by the International Mineralogical Association (T) __TOC__ T Ta – Te # Tacharanite (Y: 1961) 9.HA.7 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taenite
Taenite is a mineral found naturally on Earth mostly in iron meteorites. It is an alloy of iron and nickel, with a chemical formula of and nickel proportions of 20% up to 65%. The name is derived from the Greek ταινία for "band, ribbon". Taenite is a major constituent of iron meteorites. In octahedrites it is found in bands interleaving with kamacite forming Widmanstätten patterns, whereas in ataxites it is the dominant constituent. In octahedrites a fine intermixture with kamacite can occur, which is called plessite. Taenite is one of four known Fe-Ni meteorite minerals: The others are kamacite, tetrataenite, and antitaenite. Properties It is opaque with a metallic grayish to white color. The structure is isometric-hexoctahedral ( cubic). Its density is around 8 g/cm3 and hardness is 5 to 5.5 on the Mohs scale. Taenite is magnetic, in contrast to antitaenite. The structure is isometric-hexoctahedral ( cubic). The crystal lattice has the c≈a= 3.582±0.002 Å ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
