Britholite-(Y)  Mineral Data

Britholite-(Y) Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.
Your premier supplier of quality mineral specimens from Southern Africa and the world at large
Adamsminerals.com- Online mineral store front for mineral collectors
McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

General Britholite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ca)5(SiO4,PO4)3(OH,F)
Help on Composition: Composition: Molecular Weight = 642.79 gm
   Calcium     12.47 %  Ca   17.45 % CaO
   Yttrium     41.49 %  Y    52.69 % Y2O3
   Silicon      9.83 %  Si   21.03 % SiO2
   Phosphorus   3.61 %  P     8.28 % P2O5
   Hydrogen     0.12 %  H     1.05 % H2O
   Oxygen      31.74 %  O
   Fluorine     0.74 %  F     0.74 % F
                 -   %   F    -0.31 % -O=F2    
              ______        ______ 
              100.00 %      100.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y3Ca2(SiO4)2.25(PO4)0.75(OH)0.75F0.25
Help on Environment: Environment: In pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: In the Suishoyama pegmatite, near Iisaka, Fukushima Prefecture, Japan Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for weight, in allusion to its density and the content of Y
Help on Name Pronunciation: Name Pronunciation: Britholite-(Y) + Pronunciation Say BRITHOLITE-(Y)
Help on Synonym: Synonym: Abukumalite
  ICSD 33858
  PDF 31-315
 

Britholite-(Y) Image

Click Here for Larger Britholite-(Y) Image in a New Browser Window Images:
Click Here for Larger Britholite-(Y) Image

Britholite-(Y)

Comments: Brown cm-size britholite-(Y) grains with typical prismatic 'apatite' outline in quartz matrix with black magnetite. Tengerite-(Y) forms the white encrustation in upper right part of the photo.
Location: West Keivy Block, Western Keivy Massif, Kola peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 3.5x3.5 cm.
© Pavel M. Kartashov

Britholite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.72216
Help on Cell Dimensions: Cell Dimensions: a = 9.43, c = 6.81, Z = 2; V = 524.45 Den(Calc)= 4.07
Help on Crystal System: Crystal System: Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1), 2.75(0.9), 2.73(0.8),
Click Here for Large Britholite-(Y) Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate

Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above


Noe D C , Hughes J M , Mariano A N , Drexler J W , Kato A , Zeitschrift fur Kristallographie , 206 (1993) p.233-246, The crystal structure of monoclinic britholite-(Ce) and britholite-(Y), Note: unannealed sample, Locality: Suishoyama, Japan

View Additional jPOWD Structure files for Britholite-(Y)
[1]
 

Physical Properties of Britholite-(Y)

Help on Cleavage: Cleavage: {0001} Imperfect, {1010} Imperfect
Help on Color: Color: Reddish brown, Black.
Help on Density: Density: 4.25
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Resinous
Help on Streak: Streak: pale brown
 

Optical Properties of Britholite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1818,KPDmeas= 0.1741,KC= 0.189
Ncalc = 1.77 - 1.8
Help on Optical Data: Optical Data: Uniaxial (-), e=1.728-1.75, w=1.73-1.752, bire=0.0020.
 

Calculated Properties of Britholite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Britholite-(Y) =4.07 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0049118745
Boson Index = 0.9950881255
Help on Photoelectric: Photoelectric: PEBritholite-(Y) = 53.53 barns/electron
U=PEBritholite-(Y) x rElectron Density= 206.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Britholite-(Y) is Not Radioactive
 

Britholite-(Y) Classification

Help on  Dana Class: Dana Class: 52.04.09.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.09)Silicate apatites
 
52.04.09.00 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.04.09.01 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.02 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.03 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.04.09.04 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
52.04.09.05 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
52.04.09.06 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
52.04.09.07 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex
 
52.04.09.08 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.09 Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m
Help on  Strunz Class: Strunz Class: 09.AH.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
 
09.AH.25 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
09.AH.25 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
09.AH.25 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
09.AH.25 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
09.AH.25 Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m
 

Other Britholite-(Y) Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Britholite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

Search for Britholite-(Y) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Britholite-(Y) :

A Bijoux Google Search for Britholite-(Y)
Adam's Minerals Google Search for Britholite-(Y)
Cape Minerals Google Search for Britholite-(Y)
Dakota Matrix Minerals Google Search for Britholite-(Y)
Excalibur Mineral Corp. Google Search for Britholite-(Y)
Exceptional Minerals Google Search for Britholite-(Y)
John Betts Fine Minerals Search for Britholite-(Y)
McDougall Minerals Google Search for Britholite-(Y)
Mineral News Website Link
Rock and Mineral Shows Google Search for Britholite-(Y)
Weinrich Minerals, Inc. Google Search for Britholite-(Y)

Ask about Britholite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Britholite-(Y) Specimen Label here :

Britholite-(Y)

(Y,Ca)5(SiO4,PO4)3(OH,F)
Dana No: 52.04.09.02 Strunz No: 09.AH.25
Locality:

 

Notes: