Rhabdophane-(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 Rhabdophane-(Ce) Information

Chemical Formula:

(Ce,La)PO4•(H2O)

Composition:

Molecular Weight = 252.80 gm

Lanthanum 13.74 % La 16.11 % La₂O₃

Cerium 41.57 % Ce 48.69 % Ce₂O₃

Phosphorus 12.25 % P 28.07 % P₂O₅

Hydrogen 0.80 % H 7.13 % H₂O

Oxygen 31.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ce_0.75La_0.25(PO₄)•(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1878

Locality:

Mine dumps of Fowey Consuls, Cornwall, England, UK. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek, "rod" and "to appear", in allusion to the characteristic bands shown in its spectrum.

Name Pronunciation:

Rhabdophane-(Ce) + Pronunciation

Synonym:

ICSD 31563

PDF 46-1303

Rhabdophane-(Ce) Image

Images:

Rhabdophane-(Ce)

Comments: White acicular crystals rhabdophane-(Ce) on matrix.
Location: Reinersreuth Quarry (Köhlerloch), Großer Waldstein, Weißenstadt, Fichtelgebirge, Bavaria, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Rhabdophane-(Ce) Crystallography

Axial Ratios:

a:c = 1:0.91551

Cell Dimensions:

a = 6.96, c = 6.372, Z = 3; V = 267.32 Den(Calc)= 4.71

Crystal System:

Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6₂22

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

By Intensity(I/I_o): 2.82(1), 3.01(0.9), 6.03(0.55),

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

Mooney R C L , Acta Crystallographica , 3 (1950) p.337-340, X-ray diffraction study of cerous phosphate and related crystals, I. Hexagonal modification, Locality: synthetic

Physical Properties of Rhabdophane-(Ce)

Cleavage:

None

Color:

White, Brownish white, Yellowish white, Pinkish white.

Density:

Diaphaneity:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3.5 - Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Rhabdophane-(Ce)

Gladstone-Dale:

CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.103 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.152,KPDmeas= 0.179,KC= 0.1696
Ncalc = 1.68 - 1.8

Optical Data:

Uniaxial (+), w=1.688, e=1.744, bire=0.0560.

Calculated Properties of Rhabdophane-(Ce)

Electron Density:

Bulk Density (Electron Density)=3.63 gm/cc
note: Specific Gravity of Rhabdophane-(Ce) =4.00 gm/cc.

Fermion Index:

Fermion Index = 0.0002767203
Boson Index = 0.9997232797

Photoelectric:

PE_{Rhabdophane-(Ce)}= 277.11 barns/electron
U=PE_{Rhabdophane-(Ce)} x r_electron=1,006.27 barns/cc.

Radioactivity:

GRapi = 53,555.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Rhabdophane-(Ce) per GRapi unit = 18.67 (PPM)

Rhabdophane-(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) 567.94 ±141.99 grams of pure Rhabdophane-(Ce) .

**Estimated Radioactivity from Rhabdophane-(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 / 7.82 cm	1,238,850	3.35E-05	53,555.78	17.61
100 gm / 3.63 cm	123,885	3.35E-06	5,355.58	1.76
10 gm / 1.68 cm	12,389	3.35E-07	535.56	0.18
1 gm / 7.82 mm	1,239	3.35E-08	53.56	0.02
0.1 gm / 3.63 mm	124	3.35E-09	5.36	0.00
0.01 gm / 1.68 mm	12	3.35E-10	0.54	0.00
0.001 gm / 0.78 mm	1	3.35E-11	0.05	0.00

Weight of pure Rhabdophane-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.00 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 ( 2.77 % Th) From Sum REE Elements (55.31 % REE)

Rhabdophane-(Ce) Classification

Dana Class:

40.04.07.01 (40)Hydrated Phosphates, etc

(40.04)where A+++ XO4 · x(H2O)

(40.04.07)Rhabdophane Group

40.04.07.01 Rhabdophane-(Ce) (Ce,La)PO4•(H2O) P 6₂22 6 2 2

40.04.07.02 Rhabdophane-(La) (La,Ce)PO4•(H2O) P 6₂22 6 2 2

40.04.07.03 Rhabdophane-(Nd) (Nd,Ce,La)PO4•(H2O) P 6₂22 6 2 2

40.04.07.04 Grayite (Th,Pb,Ca)PO4•(H2O) P 6₂22 6 2 2

40.04.07.05 Brockite (Ca,Th,Ce)(PO4)•(H2O) P 6₂22 6 2 2

40.04.07.06 Tristramite (Ca,U,Fe)(PO4,SO4)•2(H2O) P 6₂22 6 2 2

Strunz Class:

08.CJ.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.45 Brockite (Ca,Th,Ce)(PO4)•(H2O) P 6₂22 6 2 2

08.CJ.45 Grayite (Th,Pb,Ca)PO4•(H2O) P 6₂22 6 2 2

08.CJ.45 Rhabdophane-(Ce) (Ce,La)PO4•(H2O) P 6₂22 6 2 2

08.CJ.45 Rhabdophane-(La) (La,Ce)PO4•(H2O) P 6₂22 6 2 2

08.CJ.45 Rhabdophane-(Nd) (Nd,Ce,La)PO4•(H2O) P 6₂22 6 2 2

08.CJ.45 Tristramite (Ca,U,Fe)(PO4,SO4)•2(H2O) P 6₂22 6 2 2

Other Rhabdophane-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Rhabdophane-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Rhabdophane-(Ce) using:

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

Visit our Advertisers for Rhabdophane-(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 Rhabdophane-(Ce) Mineral Data :

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

Rhabdophane-(Ce)

(Ce,La)PO4•(H2O)
Dana No: 40.04.07.01 Strunz No: 08.CJ.45
Locality:

Notes: