Gasparite-(Ce) Mineral Data

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

General Gasparite-(Ce) Information

Chemical Formula:

CeAsO4

Composition:

Molecular Weight = 279.03 gm

Cerium 50.21 % Ce 58.82 % Ce₂O₃

Arsenic 26.85 % As 41.18 % As₂O₅

Oxygen 22.94 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ce(AsO₄)

Environment:

In fissures, replacing synchysite, formed by amphibolite-grade metamorphism of metasedimentary rocks.

IMA Status:

Approved IMA 1987

Locality:

Southeastern slope of Pizzo Cervandone, Alpe Devero, Val d’Aosta, Piedmont, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Giovanni Gaspari, mineral collector of Crodo, Italy, who first found the mineral, and for its dominant cerium content.

Name Pronunciation:

Gasparite-(Ce) + Pronunciation

Gasparite-(Ce) Image

Images:

Gasparite-(Ce)

Comments: Crude gasparite-(Ce) crystal possibly pseudomorphous after synchysite.
Location: Mount Cervandone,Devero Valley, Baceno, Ossola Valley, Piedmont, Italy. Scale: Crystal Size 2 mm.
© Carlo Guidarin

Gasparite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.9719:1:0.944

Cell Dimensions:

a = 6.937, b = 7.137, c = 6.738, Z = 4; beta = 104.69° V = 322.69 Den(Calc)= 5.74

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.156(1), 3.355(0.77), 2.966(0.7),

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

Kolitsch U , Holtstam D , Gatedal K , European Journal of Mineralogy , 16 (2004) p.111-116, Crystal chemistry of REEXO4 compounds (X = P, As, V)., I. Paragenesis and crystal structure of phosphatian gasparite-(Ce), from the Kesebol Mn-Fe-Cu deposit, Vastra Gotaland, Sweden, Locality: Kesebol Mn-Fe-Cu deposit, Vastra Gotaland, Sweden

View Additional jPOWD Structure files for Gasparite-(Ce)
[1]

Physical Properties of Gasparite-(Ce)

Color:

Brownish red.

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Gasparite-(Ce)

Gladstone-Dale:

CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1484,KC= 0.1514
Ncalc = 1.87

Optical Data:

Biaxial (+), a=1.81, b=1.825, g=1.92, bire=0.1100, 2V(Calc)=46, 2V(Meas)=40-45.

Calculated Properties of Gasparite-(Ce)

Electron Density:

Bulk Density (Electron Density)=5.06 gm/cc
note: Specific Gravity of Gasparite-(Ce) =5.74 gm/cc.

Fermion Index:

Fermion Index = 0.0001100899
Boson Index = 0.9998899101

Photoelectric:

PE_{Gasparite-(Ce)}= 282.67 barns/electron
U=PE_{Gasparite-(Ce)} x r_electron=1,430.42 barns/cc.

Radioactivity:

GRapi = 47,220.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Gasparite-(Ce) per GRapi unit = 21.18 (PPM)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 644.14 ±161.03 grams of pure Gasparite-(Ce) .

**Estimated Radioactivity from Gasparite-(Ce)** - 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 / 6.93 cm	1,124,800	3.04E-05	47,220.84	15.52
100 gm / 3.22 cm	112,480	3.04E-06	4,722.08	1.55
10 gm / 1.49 cm	11,248	3.04E-07	472.21	0.16
1 gm / 6.93 mm	1,125	3.04E-08	47.22	0.02
0.1 gm / 3.22 mm	112	3.04E-09	4.72	0.00
0.01 gm / 1.49 mm	11	3.04E-10	0.47	0.00
0.001 gm / 0.69 mm	1	3.04E-11	0.05	0.00

Weight of pure Gasparite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.74 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 ( 2.51 % Th) From Sum REE Elements (50.21 % REE)

Gasparite-(Ce) Classification

Dana Class:

38.04.03.06 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.03)Monazite Group (Monoclinic: P21/n)

38.04.03.01 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 2₁/n 2/m

38.04.03.02 Monazite-(La) (La,Ce,Nd)PO4 P 2₁/n 2/m

38.04.03.03 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 2₁/n 2/m

38.04.03.04 Brabantite? CaTh(PO4)2 P 2₁ 2

38.04.03.05 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 2₁/n 2/m

38.04.03.06 Gasparite-(Ce) CeAsO4 P 2₁/n 2/m

38.04.03.07 Monazite-(Sm)! SmPO4 P 2₁/n 2/m

Strunz Class:

08.AD.50 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.50 Brabantite? CaTh(PO4)2 P 2₁ 2

08.AD.50 Gasparite-(Ce) CeAsO4 P 2₁/n 2/m

08.AD.50 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 2₁/n 2/m

08.AD.50 Monazite-(La) (La,Ce,Nd)PO4 P 2₁/n 2/m

08.AD.50 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 2₁/n 2/m

08.AD.50 Rooseveltite BiAsO4 P 2/m 2/m

08.AD.50 Monazite-(Sm)! SmPO4 P 2₁/n 2/m

Other Gasparite-(Ce) Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988)

See Also:

Links to other databases for Gasparite-(Ce) :
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 Gasparite-(Ce) using:

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

Visit our Advertisers for Gasparite-(Ce) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Gasparite-(Ce) Mineral Data :

Ask about Gasparite-(Ce) 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 Gasparite-(Ce) Specimen Label here :

Gasparite-(Ce)

CeAsO4
Dana No: 38.04.03.06 Strunz No: 08.AD.50
Locality:

Notes: