Tritomite-(Y) Mineral Data

Tritomite-(Y) Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


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 Name Pronunciation: Name Pronunciation: Tritomite-(Y) + Pronunciation Say TRITOMITE-(Y)
Help on Synonym: Synonym: Spenceite
 

Tritomite-(Y) Image

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

Tritomite-(Y)

Comments: Massive, resinous spencite (Tritomite-(Y)), with brown zircon crystals..
Location: BEMCO prospect (Charlotte Mine), Cranberry Lake, Byram Township, Sussex Co., New Jersey, USA. Scale: Sample Size 2.0 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

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 Diaphaneity: Diaphaneity: 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
Ncalc = 1.58 - 1.85
Help on Optical Data: Optical Data: Isotropic, n=1.63-1.77.
 

Calculated Properties of Tritomite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Tritomite-(Y) =3.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0072261677
Boson Index = 0.9927738323
Help on Photoelectric: Photoelectric: PETritomite-(Y) = 127.77 barns/electron
U=PETritomite-(Y) x relectron= 383.06 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 19,858.64 (Gamma Ray American Petroleum Institute Units)
Concentration of Tritomite-(Y) per GRapi unit = 50.36 (PPM)

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 19,858.64 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: 54.02.05.02 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02)with B in [4] coordination
  (54.02.05)Tritomite group
 
54.02.05.01 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 
54.02.05.02 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 63/m 6/m
 
54.02.05.03 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O)(?) Unk (HEX-R) Trig
Help on Strunz Class: Strunz Class: 09.AH.30 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
 
09.AH.30 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
09.AH.30 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 
09.AH.30 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)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 (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

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

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 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: 54.02.05.02 Strunz No: 09.AH.30
Locality:

 

Notes: