| 词条 | Cerianite-(Ce) |
| 释义 |
| name = Cerianite-(Ce) | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = Oxide | formula = (Ce,Th)O2 | molweight = | strunz = | system = Isometric | class = Hexoctahedral (m{{overline|3}}m) H-M symbol: (4/m {{overline|3}} 2/m) | symmetry = Fm{{overline|3}}m | unit cell = a = 5.42 Å; Z = 4 | color = Dark greenish amber-yellow, yellow, buff | colour = | habit = octahedra; earthy, massive | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | streak = | diaphaneity = Translucent or transparent | gravity = | density = 7.20 (synth. material, calc.; approximated) | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = [1][2][3] }}Cerianite-(Ce) is a relatively rare oxide mineral, belonging to uraninite group with the formula (Ce,Th)O2.[2][3] It is one of a few currently known minerals containing essential tetravalent cerium, the other examples being stetindite and dyrnaesite-(La).[4][5] Occurrence and associationCerianite-(Ce) is associated with alkaline rocks, mostly nepheline syenites.[6] It may be found in carbonatites.[3] Cerianite-(Ce) associates with minerals of the apatite group, bastnäsite-group minerals, calcite, feldspar, "fluocerite", "hydromica", ilmenite, nepheline, magnetite, "törnebohmite" and tremolite.[6] It is the most simple cerium mineral known.[3] Notes on chemistryBeside thorium cerianite-(Ce) may contain trace niobium, yttrium, lanthanum, ytterbium, zirconium and tantalum.[6] Crystal structureFor details on crystal structure see cerium(IV) oxide. References1. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Cerianite-%28Ce%29 Mineralienatlas] {{oxide-mineral-stub}}2. ^Graham, A.R., 1955. Cerianite CeO2: a new rare-earth oxide mineral. American Mineralogist 40, 560-564 3. ^1 2 3 {{cite web|url=http://www.mindat.org/min-929.html |title=Cerianite-(Ce): Cerianite-(Ce) mineral information and data |website=Mindat.org |accessdate=2016-03-04}} 4. ^{{cite web|url=http://www.mindat.org/min-38899.html |title=Stetindite: Stetindite mineral information and data |website=Mindat.org |accessdate=2016-03-04}} 5. ^{{cite web|url=http://www.mindat.org/min-46510.html |title=Dyrnaesite-(La): Dyrnaesite-(La) mineral information and data |website=Mindat.org |accessdate=2016-03-04}} 6. ^1 2 3 {{cite web|url=http://www.handbookofmineralogy.org/pdfs/cerianite-(Ce).pdf |title=Cerianite-(Ce) - Handbook of Mineralogy |website=Handbookofmineralogy.org |accessdate=2016-03-04}} 4 : Oxide minerals|Cerium minerals|Lanthanide minerals|Cubic minerals |
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