| 词条 | Cerite |
| 释义 |
| name = Cerite | category = Silicate mineral group | boxwidth = | boxbgcolor = | image = Cerite.jpg | imagesize = 260px | caption = Cerite - Bastnas - Deposit Topotype | formula = (Ce,La,Ca)9(Mg,Fe+3)(SiO4)6(SiO3OH)(OH)3 | molweight = | system = Trigonal | class = Ditrigonal pyramidal (3m) (same H-M symbol) | symmetry = R3c | color = Clove-brown with a reddish tinge; pale lavender-brown to colorless in thin fragments | habit = Massive granular | twinning = | cleavage = None | fracture = Uneven | tenacity = | mohs = 5 to 5.5 | luster = Vitreous to resinous | streak = White to greyish white | diaphaneity = Subtranslucent to opaque | gravity = 4.7 to 4.86 | density = | polish = | opticalprop = Uniaxial (+) | refractive = nω = 1.806 - 1.810 nε = 1.810 - 1.820 | birefringence = δ = 0.010 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence= | absorption = | melt = | fusibility = | diagnostic = | solubility = | other = | alteration = | references = [1][2][3] }}Cerite is a complex silicate mineral group containing cerium, formula (Ce,La,Ca)9(Mg,Fe+3)(SiO4)6(SiO3OH)(OH)3.[2] The cerium and lanthanum content varies with the Ce rich species (cerite-(Ce)) and the La rich species (cerite-(La)).[3][4] Analysis of a sample from the Mountain Pass carbonatite gave 35.05% Ce2O3 and 30.04% La2O3.[2] Cerite was first described in 1803 for an occurrence in Bastnäs in Västmanland, Sweden.[5] The lanthanum rich species, cerite-(La) was first described for an occurrence in the Khibina massif, Kola Peninsula, Russia in 2002.[6] See also{{Portal|Earth sciences}}
References1. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Cerite Mineralienatlas] {{Commons category}}{{silicate-mineral-stub}}2. ^1 2 http://rruff.geo.arizona.edu/doclib/hom/ceritece.pdf Handbook of Mineralogy 3. ^http://www.mindat.org/min-931.html Mindat Cerite-(Ce) 4. ^http://www.mindat.org/min-26408.html Mindat Cerite-(La) 5. ^1 http://webmineral.com/data/Cerite-(Ce).shtml Webmineral (Ce) 6. ^http://webmineral.com/data/Cerite-(La).shtml Webmineral (La) 4 : Lanthanide minerals|Iron minerals|Nesosilicates|Trigonal minerals |
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