Minasgeraisite-(Y) Mineral Data + Say MINASGERAISITE-(Y)

General Minasgeraisite-(Y) Information

Help on Chemical  Formula: Chemical Formula: CaY2Be2Si2O10
Help on Composition: Composition: Molecular Weight = 452.08 gm
   Calcium     8.87 %  Ca   12.40 % CaO
   Yttrium    39.33 %  Y    49.95 % Y2O3
   Beryllium   3.99 %  Be   11.07 % BeO
   Silicon    12.43 %  Si   26.58 % SiO2
   Oxygen     35.39 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaY2Be2(Si2O10)
Help on Environment: Environment: Granitic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: The Jaguaracu Pegmatite, Minas Gerais, Brazil. Also known as the Jose Miranda mine or the Ze Pinto or Jose Pinto mine. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
 

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Minasgeraisite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3003:1:0.6217
Help on Cell Dimensions: Cell Dimensions: a = 9.833, b = 7.562, c = 4.702, Z = 2; beta = 90.46° V = 349.62 Den(Calc)= 4.29
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.83(1), 3.11(1), 2.54(0.9),
 

Physical Properties of Minasgeraisite-(Y)

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Violet, Lilac, Purple.
Help on Density: Density: 4.25
Help on Diaphaniety: Diaphaniety: Translucent
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: pale purple white
 

Optical Properties of Minasgeraisite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1772,KPDmeas= 0.1788,KC= 0.1928
Help on Optical Data: Optical Data: Biaxial (+), a=1.74, b=1.754, g=1.786, bire=0.0460, 2V(Calc)=68, 2V(Meas)=68.
 

Calculated Properties of Minasgeraisite-(Y)

Help on Electron Density: Electron Density:

relectron=4.02 gm/cc
note: rMinasgeraisite-(Y) =4.25 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.04596
Boson Index = 0.95404
Help on Photoelectric: Photoelectric:

PEMinasgeraisite-(Y) = 50.42 barns/electron
U=PEMinasgeraisite-(Y) x relectron= 202.89 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Minasgeraisite-(Y) is Not Radioactive

 

Minasgeraisite-(Y) Classification

Help on  Dana Class: Dana Class: 54.2.1b.6 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.2)with B in [4] coordination
  (54.2.1b)Datolite group (Homilite series)
 
54.2.1b.1 Bakerite Ca4B4(BO4)(SiO4)3(OH)3·(H2O) P 21/c 2/m
 
54.2.1b.2 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 21/c 2/m
 
54.2.1b.3 Gadolinite-(Y) Y2FeBe2Si2O10 P 21/a 2/m
 
54.2.1b.4 Calciogadolinite* CaREE(Fe)Be2Si2O10 P 21/a 2/m
 
54.2.1b.5 Homilite Ca2(Fe,Mg)B2Si2O10 P 21/a 2/m
 
54.2.1b.6 Minasgeraisite-(Y) CaY2Be2Si2O10 P 21/a 2/m
Help on  Strunz Class: Strunz Class: VIII/B.29-40 VIII - Silicates
  VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with beryllium and boron
  VIII/B.29 - Datolite/Gadolinite group
 
VIII/B.29-10 Datolite CaBSiO4(OH) P 21/c 2/m
 
VIII/B.29-20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3·(H2O) P 21/c 2/m
 
VIII/B.29-30 Homilite Ca2(Fe,Mg)B2Si2O10 P 21/a 2/m
 
VIII/B.29-35 Vistepite Mn4SnB2(SiO4)4(OH)2 P1 1
 
VIII/B.29-40 Minasgeraisite-(Y) CaY2Be2Si2O10 P 21/a 2/m
 
VIII/B.29-50 Gadolinite-(Y) Y2FeBe2Si2O10 P 21/a 2/m
 
VIII/B.29-60 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 21/c 2/m
 
VIII/B.29-70 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 21/a 2/m
 
VIII/B.29-80 Hingganite-(Ce) Ce2Be2(SiO4)2(OH)2 P 21/a 2/m
 
VIII/B.29-90 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 21/a 2/m
 
VIII/B.29-100 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 21/a 2/m
 

Other Minasgeraisite-(Y) Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.71,p603-607,1986) OPTIC PROP.(Am.Min.,Vol.71,p603-607,1986)
Help on See Also: See Also: Links to other databases for Minasgeraisite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

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Minasgeraisite-(Y)

CaY2Be2Si2O10
Dana No: 54.2.1b.6 Strunz No: VIII/B.29-40
Locality:

 

Notes:

 

 
   
 
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