Tritomite-(Y) Mineral Data + Say TRITOMITE-(Y)


General Tritomite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ca,La,Fe++)5(Si,B,Al)3(O,OH,F)13 (?)
Help on Composition: Composition: Molecular Weight = 693.60 gm
   Calcium     8.67 %  Ca   12.13 % CaO
   Lanthanum  20.03 %  La   23.49 % La2O3
   Yttrium    25.64 %  Y    32.56 % Y2O3
   Aluminum    1.17 %  Al    2.21 % Al2O3
   Iron        4.03 %  Fe    5.18 % FeO
   Silicon     8.10 %  Si   17.33 % SiO2
   Boron       1.09 %  B     3.51 % B2O3
   Hydrogen    0.44 %  H     3.90 % H2O
   Oxygen     25.37 %  O
   Fluorine    5.48 %  F     5.48 % F
                -   %  F    -2.31 % -O=F2
             ______        ______ 
             100.00 %      103.46 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: 5(Y0.4)5(Ca0.3)5(La0.2)5(Fe2+0.1)Si2B0.7Al0.3O8(OH)3F2
Help on Environment: Environment: Granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Cranberry Lake, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "three" and "to cut," in allusion to the trihedral cavities left in the host rock by the crystals.
Help on Synonym: Synonym: Spenceite
 

Search for Tritomite-(Y) Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

  

Tritomite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.7339
Help on Cell Dimensions: Cell Dimensions: a = 9.32, c = 6.84, Z = 2; V = 514.54 Den(Calc)= 4.48
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): 2.78(1), 3.13(0.5), 4.02(0.5),
 

Physical Properties of Tritomite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish black, Dark green black, Reddish brown.
Help on Density: Density: 3.05 - 3.4, Average = 3.22
Help on Diaphaniety: Diaphaniety: Translucent to Subopaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 3.5-6.5
Help on Luster: Luster: Vitreous - Resinous
 

Optical Properties of Tritomite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.147 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.175 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1563,KPDmeas= 0.2171,KC= 0.1893
Help on Optical Data: Optical Data: Isotropic, n=1.63-1.77.
 

Calculated Properties of Tritomite-(Y)

Help on Electron Density: Electron Density:

relectron=3.00 gm/cc
note: rTritomite-(Y) =3.23 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00722
Boson Index = 0.99278
Help on Photoelectric: Photoelectric:

PETritomite-(Y) = 127.77 barns/electron
U=PETritomite-(Y) x relectron= 383.06 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 19,858.62 (Gamma Ray American Petroleum Institute Units)

Tritomite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Tritomite-(Y) - weak
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 8.40 cm 448,596 1.21E-05 19,858.62 6.53
100 gm / 3.90 cm 44,860 1.21E-06 1,985.86 0.65
10 gm / 1.81 cm 4,486 1.21E-07 198.59 0.07
1 gm / 8.40 mm 449 1.21E-08 19.86 0.01
0.1 gm / 3.90 mm 45 1.21E-09 1.99 0.00
0.01 gm / 1.81 mm 4 1.21E-10 0.20 0.00
0.001 gm / 0.84 mm 0 1.21E-11 0.02 0.00

Weight of pure Tritomite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.23 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 1.00 % Th) From Sum REE Elements (20.03 % REE)
 

Tritomite-(Y) Classification

Help on  Dana Class: Dana Class: 54.2.5.2 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.2)with B in [4] coordination
  (54.2.5)Tritomite group
 
54.2.5.1 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 
54.2.5.2 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 63/m 6/m
 
54.2.5.3 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)·n(H2O)(?) Unk (HEX-R) Trig
Help on  Strunz Class: Strunz Class: VIII/B.33-30 VIII - Silicates
  VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with beryllium and boron
  VIII/B.33 - Melanocerite-(Ce) - Tritomite-(Ce) series
 
VIII/B.33-10 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)·n(H2O)(?) Unk (HEX-R) Trig
 
VIII/B.33-20 Okanoganite-(Y) (Na,Ca)3(Y,Ce)12Si6B2O27F14 R 3m 3m
 
VIII/B.33-25 Vicanite-(Ce) (Ca,Ce,La,Th)15As(As0.5,Na0.5)FeSi6B4O40F7 R 3m 3m
 
VIII/B.33-30 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 63/m 6/m
 
VIII/B.33-40 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 

Other Tritomite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tritomite-(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

Search for Tritomite-(Y) using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tritomite-(Y) :

AA Mineral Specimens
B & L Fine Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
Heliodor
John Betts Fine Minerals
Mason's Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz
T G Fine Minerals
Wrights Rock Shop

Translate Tritomite-(Y) Mineral Data :

Ask about Tritomite-(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 Tritomite-(Y) Specimen Label here :

Tritomite-(Y)

(Y,Ca,La,Fe++)5(Si,B,Al)3(O,OH,F)13 (?)
Dana No: 54.2.5.2 Strunz No: VIII/B.33-30
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links