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Xenotime Group
The xenotime group is a grouping of minerals containing anhydrous phosphates and vanadates. Xenotime group members Members of the xenotime group include: *Phosphates: **Xenotime ***Xenotime-(Y): ***Xenotime-(Yb): **Pretulite: *Arsenates: **Chernovite (other), Chernovite ***Chernovite-(Y): *Vanadates: **Wakefieldite ***Wakefieldite-(Y): ***Wakefieldite-(La): ***Wakefieldite-(Ce): ***Wakefieldite-(Nd): References Phosphate minerals, # Arsenate minerals, # Vanadate minerals, # {{mineral-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphate
In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid . The phosphate or orthophosphate ion is derived from phosphoric acid by the removal of three protons . Removal of one or two protons gives the dihydrogen phosphate ion and the hydrogen phosphate ion ion, respectively. These names are also used for salts of those anions, such as ammonium dihydrogen phosphate and trisodium phosphate. File:3-phosphoric-acid-3D-balls.png, Phosphoricacid File:2-dihydrogenphosphate-3D-balls.png, Dihydrogenphosphate File:1-hydrogenphosphate-3D-balls.png, Hydrogenphosphate File:0-phosphate-3D-balls.png, Phosphate In organic chemistry, phosphate or orthophosphate is an organophosphate, an ester of orthophosphoric acid of the form where one or more hydrogen atoms are replaced by organic groups. An example is trimethyl phosphate, . The term also refers to the triv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanadate
In chemistry, a vanadate is an anionic coordination complex of vanadium. Often vanadate refers to oxoanions of vanadium, most of which exist in its highest oxidation state of +5. The complexes and are referred to as hexacyanovanadate(III) and nonachlorodivanadate(III), respectively. A simple vanadate ion is the tetrahedral orthovanadate anion, (which is also called vanadate(V)), which is present in e.g. sodium orthovanadate and in solutions of in strong base ( pH > 13). Conventionally this ion is represented with a single double bond, however this is a resonance form as the ion is a regular tetrahedron with four equivalent oxygen atoms. Additionally a range of polyoxovanadate ions exist which include discrete ions and "infinite" polymeric ions. There are also vanadates, such as rhodium vanadate, , which has a statistical rutile structure where the and ions randomly occupy the positions in the rutile lattice, that do not contain a lattice of cations and balancing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenotime
Xenotime is a rare-earth phosphate mineral, the major component of which is yttrium orthophosphate ( Y P O4). It forms a solid solution series with chernovite-(Y) ( Y As O4) and therefore may contain trace impurities of arsenic, as well as silicon dioxide and calcium. The rare-earth elements dysprosium, erbium, terbium and ytterbium, as well as metal elements such as thorium and uranium (all replacing yttrium) are the expressive secondary components of xenotime. Due to uranium and thorium impurities, some xenotime specimens may be weakly to strongly radioactive. Lithiophyllite, monazite and purpurite are sometimes grouped with xenotime in the informal "anhydrous phosphates" group. Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finest xenotime crystals. Etymology The name ''xenotime'' is from the Greek words κενός ''vain'' and τιμή ''honor'', ak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenotime-(Y)
Xenotime is a rare-earth phosphate mineral, the major component of which is yttrium orthophosphate ( Y P O4). It forms a solid solution series with chernovite-(Y) ( Y As O4) and therefore may contain trace impurities of arsenic, as well as silicon dioxide and calcium. The rare-earth elements dysprosium, erbium, terbium and ytterbium, as well as metal elements such as thorium and uranium (all replacing yttrium) are the expressive secondary components of xenotime. Due to uranium and thorium impurities, some xenotime specimens may be weakly to strongly radioactive. Lithiophyllite, monazite and purpurite are sometimes grouped with xenotime in the informal "anhydrous phosphates" group. Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finest xenotime crystals. Etymology The name ''xenotime'' is from the Greek words κενός ''vain'' and τιμή ''honor'', akin to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenotime-(Yb)
Xenotime is a rare-earth phosphate mineral, the major component of which is yttrium orthophosphate ( Y P O4). It forms a solid solution series with chernovite-(Y) ( Y As O4) and therefore may contain trace impurities of arsenic, as well as silicon dioxide and calcium. The rare-earth elements dysprosium, erbium, terbium and ytterbium, as well as metal elements such as thorium and uranium (all replacing yttrium) are the expressive secondary components of xenotime. Due to uranium and thorium impurities, some xenotime specimens may be weakly to strongly radioactive. Lithiophyllite, monazite and purpurite are sometimes grouped with xenotime in the informal "anhydrous phosphates" group. Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finest xenotime crystals. Etymology The name ''xenotime'' is from the Greek words κενός ''vain'' and τιμή ''honor'', akin to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chernovite (other)
{{disambiguation ...
Chernovite may refer to: * Chernovite-(Y), a mineral * Chernovite-(Ce), a mineral * Chernovite (hacking group), credited as authors of the software toolkit Pipedream Pipe dream may refer to: Music * ''Pipe Dream'' (John Williamson album), 1997, or the titular song * ''Pipedream'' (Alan Hull album), 1973 * ''Pipe Dreams'' (Murray Head album), 1995 * "Pipe Dreams" (Nelly Furtado song), 2016 * ''Pipe Dream ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chernovite-(Y)
Chernovite-(Y) is a mineral. It was wirst described in 1967 as Chernovite, named after the Russian geologist Aleksandr A. Chernov. The suffix ''-(Y)'' was added in 1987. See also * Chernovite-(Ce) External links * * {{mineral-stub Yttrium minerals Arsenate minerals Tetragonal minerals Minerals described in 1967 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakefieldite
Wakefieldite () is an uncommon rare-earth element vanadate mineral. There are four main types described of wakefieldite- wakefieldite-(La), wakefieldite-(Ce), wakefieldite-(Nd), and wakefieldite-(Y), depending upon the dominant rare-earth metal ion present. Wakefieldite has a Mohs hardness ranging from 4 to 5. Wakefieldite forms crystals of tetragonal structure. In terms of crystal structure, it is the vanadate analog of the rare-earth phosphate mineral xenotime. Unlike xenotime, it is more favorable for wakefieldite to contain the lighter rare-earth elements over the heavier ones. Due to the lanthanide contraction, the heavier rare earths have smaller ionic radii than the lighter ones. When the phosphate anion is replaced by the larger vanadate anion, the tetragonal crystal system preferentially accommodates the larger light rare-earth elements. Wakefieldite was first described for an occurrence in the Evans Lou mine, St. Pierre de Wakefield, Quebec, Canada Canada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakefieldite-(Y)
Wakefieldite () is an uncommon rare-earth element vanadate mineral. There are four main types described of wakefieldite- wakefieldite-(La), wakefieldite-(Ce), wakefieldite-(Nd), and wakefieldite-(Y), depending upon the dominant rare-earth metal ion present. Wakefieldite has a Mohs scale of mineral hardness, Mohs hardness ranging from 4 to 5. Wakefieldite forms crystals of tetragonal structure. In terms of crystal structure, it is the vanadate analog of the rare-earth phosphate mineral xenotime. Unlike xenotime, it is more favorable for wakefieldite to contain the lighter rare-earth elements over the heavier ones. Due to the lanthanide contraction, the heavier rare earths have smaller ionic radii than the lighter ones. When the phosphate anion is replaced by the larger vanadate anion, the tetragonal crystal system preferentially accommodates the larger light rare-earth elements. Wakefieldite was first described for an occurrence in the Evans Lou mine, Val-des-Monts, Quebec, St. Pier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakefieldite-(La)
Wakefieldite-(La) () is the lanthanum analogue of the uncommon rare-earth element vanadate mineral Wakefieldite. It is a member of the xenotime group. Wakefieldite-(La) was first described in 2008 for an occurrence in the Glücksstern mine, Gottlob Hill, Friedrichroda, Thuringia, Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ....Webmineral dataWakefieldite-(La) References Lanthanum minerals Vanadate minerals Tetragonal minerals Minerals in space group 141 Minerals described in 2008 {{mineral-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakefieldite-(Ce)
Wakefieldite-(Ce) () is the cerium analogue of the uncommon rare-earth element vanadate mineral Wakefieldite. It is a member of the xenotime group. Wakefieldite-(Ce) was first described in 1977. It was initially given the name ''kusuïte'' for its type locality in the Kusu deposit, SW of Kinshasa, Zaire Zaire (, ), officially the Republic of Zaire (french: République du Zaïre, link=no, ), was a Congolese state from 1971 to 1997 in Central Africa that was previously and is now again known as the Democratic Republic of the Congo. Zaire was, .... In 1987 it was renamed as the Ce analog of wakefieldite-Y.Handbook of MineralogyWakefieldite-(Ce) References Cerium minerals Vanadate minerals Tetragonal minerals Minerals in space group 141 Minerals described in 1977 {{mineral-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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