[Current Minerals] [Order Status] [Policies] [e-Bay Items] B & L Minerals, Fine Mineral specimens for sale for collectors of all levels General Gadolinite-(Y) InformationY2Fe++Be2Si2O10 |
Molecular Weight = 467.85 gm |
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Yttrium 38.01 % Y 48.27 % Y2O3 |
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Beryllium 3.85 % Be 10.69 % BeO |
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Iron 11.94 % Fe 15.36 % FeO |
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Silicon 12.01 % Si 25.69 % SiO2 |
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Oxygen 34.20 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
Y2Fe2+Be2(Si2O10) |
Pegmatite veins rich in alkaline-earth elements. |
Valid Species (Pre-IMA) 1800 |
Ytterby, Resarö, Sweden. Link to MinDat.org Location Data. |
Named after the gadolium and ytterbium content. |
Gadolinite-(Y) + Pronunciation |
Calciogadolinite |
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ICSD 40095 |
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PDF 26-1134 |
| | Gadolinite-(Y) Image
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Gadolinite-(Y) Crystallographya:b:c =1.3099:1:0.6172 |
a = 9.89, b = 7.55, c = 4.66, Z = 2; beta = 90.61° V = 347.94 Den(Calc)= 4.47 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a |
By Intensity(I/Io): 2.83(1), 3.13(1), 2.56(0.9), |
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Mouse
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| Physical Properties of Gadolinite-(Y)None |
Brown, Green, Green black, Light green, Black. |
4 - 4.5, Average = 4.25 |
Subtransparent to opaque |
Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende). |
Crystalline - Poor - Occurs primarily as crudely formed crystals. |
Massive - Uniformly indistinguishable crystals forming large masses. |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
6.5-7 - Pyrite-Quartz |
Non-fluorescent. |
Vitreous - Greasy |
greenish gray |
| Optical Properties of Gadolinite-(Y)CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1775,KPDmeas= 0.1867,KC= 0.19 Ncalc = 1.76 - 1.86 Biaxial (+), a=1.77, b=1.79, g=1.82, bire=0.0500 |
| Calculated Properties of Gadolinite-(Y)Bulk Density (Electron Density)=4.00 gm/cc |
note: Specific Gravity of Gadolinite-(Y) =4.25 gm/cc. Fermion Index = 0.04 |
Boson Index = 0.96 PEGadolinite-(Y) = 51.62 barns/electron |
U=PEGadolinite-(Y) x rElectron Density= 206.33 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Gadolinite-(Y) is Not Radioactive | Gadolinite-(Y) Classification54.02.01b.03 (54)Nesosilicate Borosilicates and Some Beryllosilicates |
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(54.02)with B in [4] coordination |
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(54.02.01b)Datolite group (Homilite series) |
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09.AJ.20 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, |
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| Other Gadolinite-(Y) InformationNAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) |
Links to other databases for Gadolinite-(Y) : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (UofA) 8 - MinDAT 9 - MinMax(Deutsch) 10 - MinMax(English) 11 - Mineralienatlas (Deutsch) 12 - QUT Mineral Atlas 13 - Ruff.Info 14 - WWW-MINCRYST Search for Gadolinite-(Y) using: Visit our Advertisers for Gadolinite-(Y) : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Gadolinite-(Y) Mineral Data : Ask about Gadolinite-(Y) here : Print or Cut-and-Paste your Gadolinite-(Y) Specimen Label here :
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