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List Of Minerals Recognized By The International Mineralogical Association (I)
__TOC__ I # Ianbruceite (IMA2011-049) 8.DA.5 o o# Iangreyite (IMA2009-087) 8.DE.4 o # Ianthinite (Y: 1926) 4.GA.1 (IUPAC: diuranium(IV) tetrauranyl tetrahydro hexaoxide nonahydrate) # |
Ikaite
Ikaite is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. Ikaite tends to form very steep or spiky pyramidal crystals, often radially arranged, of varied sizes from thumbnail size aggregates to gigantic salient spurs. It is only found in a metastable state and decomposes rapidly by losing most of its water content once removed from near-freezing water. This "melting mineral" is more commonly known through its pseudomorphs. Distribution It is usually considered a rare mineral, but this is likely due to difficulty in preserving samples. It was first discovered in nature by the Danish mineralogist Pauly in the Ikka (then spelt Ika) fjord in southwest Greenland, close to Ivittuut, the locality of the famous cryolite deposit. Here ikaite occurs in truly spectacular towers or columns (up to tall) growing out of the fjord floor towards the surface water, where they are naturally truncated by waves, or unnaturally by the occasional boat. At the Ikka Fjord, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilyukhinite
Ilyukhinite is a very rare mineral of the eudialyte group, with formula .Chukanov, N.V., Rastsvetaeva, R.K., Rozenberg, K.A., Aksenov, S.M., Pekov, I.V., Belakovskiy, D.I., and Kristiansen, R., 2015, Ilyukhinite, IMA 2015-065. CNMNC Newsletter No. 28, December 2015, 1860; Mineralogical Magazine 79, 1859–1864 The formula given is simplified and does not show the presence of cyclic silicate groups. Ilyukhinite is the second group representative with species-defining hydronium In chemistry, hydronium (hydroxonium in traditional British English) is the common name for the aqueous cation , the type of oxonium ion produced by protonation of water. It is often viewed as the positive ion present when an Arrhenius acid is d ... ion after aqualite. References Further reading * Johnsen, O., Ferraris, G., Gault, R.A., Grice, D.G., Kampf, A.R., and Pekov, I.V., 2003. The nomenclature of eudialyte-group minerals. The Canadian Mineralogist 41, 785–794 Cyclosilicates Calcium minerals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilsemannite
Ilsemannite is an uncommon amorphous complex heterovalent molybdenum oxide, that was first published in 1871, and has been a valid species since pre- IMA. It is a grandfathered mineral, meaning the name ilsemannite is still believed to refer to a valid species. However, it is likely that specimens formed under different conditions, in different localities do not have the same composition, and may even be a mixture of compounds. Furthermore, it is hard to analyze the specimens due to them being a mixture, hence why adequate analyses are lacking of said mineral. Ilsemannite is believed to be identical to synthetic molybdic oxide. Properties Ilsemannite is soluble in water, which at first produces a greenish blue color, which later changes to a deep molybdenum-blue. This is probably why Native Americans believed that ilsemannite colored the waters blue in the Idaho Springs area, however, this has been debunked. Ilsemannite is now believed to consist of molybdenum (66.34%) and oxygen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilmenite
Ilmenite is a titanium-iron oxide mineral with the idealized formula . It is a weakly magnetic black or steel-gray solid. Ilmenite is the most important ore of titanium and the main source of titanium dioxide, which is used in paints, printing inks, fabrics, plastics, paper, sunscreen, food and cosmetics. Structure and properties Ilmenite is a heavy (specific gravity 4.7), moderately hard (Mohs hardness 5.6 to 6), opaque black mineral with a submetallic luster. It is almost always massive, with thick tabular crystals being quite rare. It shows no discernible cleavage, breaking instead with a conchoidal to uneven fracture. Ilmenite crystallizes in the trigonal system with space group ''R''. The ilmenite crystal structure consists of an ordered derivative of the corundum structure; in corundum all cations are identical but in ilmenite Fe2+ and Ti4+ ions occupy alternating layers perpendicular to the trigonal c axis. Pure ilmenite is paramagnetic (showing only very weak attrac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illite
Illite is a group of closely related non-expanding clay minerals. Illite is a secondary mineral precipitate, and an example of a phyllosilicate, or layered alumino-silicate. Its structure is a 2:1 sandwich of silica tetrahedron (T) – alumina octahedron (O) – silica tetrahedron (T) layers. The space between this T-O-T sequence of layers is occupied by poorly hydrated potassium cations which are responsible for the absence of swelling. Structurally, illite is quite similar to muscovite with slightly more silicon, magnesium, iron, and water and slightly less tetrahedral aluminium and interlayer potassium. The chemical formula is given as , but there is considerable ion (isomorphic) substitution. It occurs as aggregates of small monoclinic grey to white crystals. Due to the small size, positive identification usually requires x-ray diffraction or SEM-EDS ( automated mineralogy) analysis. Illite occurs as an altered product of muscovite and feldspar in weathering and hydrothermal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilirneyite
Ilirneyite is a rare tellurate mineral with the formula Mg0.5 nMn3+(TeO3)3€¢4.5H2O. It was discovered at the Sentyabr'skoe deposit (of silver and gold) in the Ilirney Range, Western Chukotka, Russia.Pekov, I.V., Siidra, O.I., Vlasov, E.A.,Yapaskurt, V.O., Lukina, E.A., Polekhovsky, Y.S., and Apletalin, A.V., 2015. Ilirneyite, IMA2015-046. CNMNC Newsletter No. 27, October 2015, 1225; Mineralogical Magazine 79, 1229–1236 Relation to other minerals Ilirneyite is a trivalent-manganese-analogue of zemannite. It is also a zinc- and manganese Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy use ...-analogue of keystoneite and kinichilite. External links * Ilirneyite on Mindat: References Tellurate and selenate minerals Magnesium minerals Zinc minerals Manganese(III) minerals Hex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
