Yttrocerite Mineral Data

Yttrocerite Mineral Data

General Yttrocerite Information

Chemical Formula:

CaF2 + (Y,Ce)F3

Composition:

Molecular Weight = 236.78 gm

Calcium 16.93 % Ca 23.68 % CaO

Cerium 14.79 % Ce 17.33 % Ce₂O₃

Yttrium 28.16 % Y 35.76 % Y₂O₃

Fluorine 40.12 % F 40.12 % F

- % F -16.89 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaY_0.75Ce_0.25F₅

IMA Status:

Not Approved IMA

Locality:

Falun, Sweden, Sussex Co., New Jersey. Link to MinDat.org Location Data.

Name Origin:

Named from its chemical composition containing ytterbium (Named after Ytterby, Sweden) and cerium (Named after the asteroid, Ceres)..

Search for Yttrocerite Images

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.

Yttrocerite Crystallography

Crystal System:

IsometricSpace Group: Unk

Physical Properties of Yttrocerite

Cleavage:

[111] Perfect, [111] Perfect, [111] Perfect

Color:

Reddish blue, Purplish gray, Brown.

Density:

3 - 4, Average = 3.5

Diaphaniety:

Translucent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4-5 - Fluorite-Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Yttrocerite

Gladstone-Dale:

CI meas= 0.204 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1229,KC= 0.1543

Optical Data:

Isotropic, n=1.43.

Calculated Properties of Yttrocerite

Electron Density:

r_electron=3.22 gm/cc
note: r_Yttrocerite=3.50 gm/cc.

Fermion Index

Fermion Index = 0.00022
Boson Index = 0.99978

Photoelectric:

PE_Yttrocerite= 112.77 barns/electron
U=PE_Yttrocerite x r_electron= 362.57 barns/cc.

Radioactivity:

GRapi = 14,495.39 (Gamma Ray American Petroleum Institute Units)

Yttrocerite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Yttrocerite** - 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 / 8.17 cm	331,384	8.96E-06	14,495.39	4.77
100 gm / 3.79 cm	33,138	8.96E-07	1,449.54	0.48
10 gm / 1.76 cm	3,314	8.96E-08	144.95	0.05
1 gm / 8.17 mm	331	8.96E-09	14.50	0.00
0.1 gm / 3.79 mm	33	8.96E-10	1.45	0.00
0.01 gm / 1.76 mm	3	8.96E-11	0.14	0.00
0.001 gm / 0.82 mm	0	8.96E-12	0.01	0.00

Weight of pure Yttrocerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.50 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 ( 0.74 % Th) From Sum REE Elements (14.79 % REE)

Yttrocerite Classification

Dana Class:

9.0.0.0 (9)Halide Minerals

(9.0)Without Dana Classification Numbers

(Fluoride, Anhydrous)

Strunz Class:

III/X.00-00 III - Halogenides

III/X - Unclassified Strunz Halogenides

III/X.00 - Fluoride, Anhydrous

Other Yttrocerite Information

References:

NAME( Emsley91) PHYS. PROP.(Dana) OPTIC PROP.(Dana)

See Also:

Links to other databases for Yttrocerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 - Mineral and Gemstone Kingdom 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

Search for Yttrocerite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Yttrocerite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Yttrocerite Mineral Data :

Ask about Yttrocerite 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 Español

Print or Cut-and-Paste your Yttrocerite Specimen Label here :

Yttrocerite

CaF2 + (Y,Ce)F3
Dana No: Unknown Strunz No: III/X.00-00
Locality:

Notes: