Arsenoflorencite-(Nd) Mineral Data

General Arsenoflorencite-(Nd) Information

Chemical Formula:

(Nd,La,Ce,Ba)(Al,Fe+++)3(AsO4,PO4)2(OH)6

Composition:

Molecular Weight = 610.95 gm

Barium 2.25 % Ba 2.51 % BaO

Lanthanum 4.55 % La 5.33 % La₂O₃

Cerium 4.59 % Ce 5.37 % Ce₂O₃

Aluminum 9.94 % Al 18.78 % Al₂O₃

Iron 6.86 % Fe 9.80 % Fe₂O₃

Arsenic 20.85 % As 31.98 % As₂O₅

Phosphorus 1.52 % P 3.49 % P₂O₅

Hydrogen 0.99 % H 8.85 % H₂O

Neodymium 11.80 % Nd 13.77 % Nd₂O₃

Oxygen 36.66 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Nd_0.5La_0.2Ce_0.2Ba_0.1Al_2.25Fe³⁺_0.75(AsO₄)_1.7(PO₄)_0.3(OH)₆

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named as the arsenic analog of florencite and the dominant rare earth element, Neodymium.

Name Pronunciation:

Arsenoflorencite-(Nd) + Pronunciation

Arsenoflorencite-(Nd) Crystallography

Axial Ratios:

a:c = 1:2.35419

Cell Dimensions:

a = 7.03, c = 16.55, Z = 3; V = 708.34 Den(Calc)= 4.30

Crystal System:

Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

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

By Intensity(I/I_o): 2.95(1), 3.51(0.6), 5.65(0.55),

Physical Properties of Arsenoflorencite-(Nd)

Color:

White.

Density:

4.05 - 4.15, Average = 4.09

Diaphaneity:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Arsenoflorencite-(Nd)

Gladstone-Dale:

CI meas= 0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.115 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1733,KPDmeas= 0.1817,KC= 0.1957
Ncalc = 1.79 - 1.84

Optical Data:

Uniaxial (+), w=1.74, e=1.75, bire=0.0100.

Calculated Properties of Arsenoflorencite-(Nd)

Electron Density:

Bulk Density (Electron Density)=3.84 gm/cc
note: Specific Gravity of Arsenoflorencite-(Nd) =4.10 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Arsenoflorencite-(Nd)}= 136.19 barns/electron
U=PE_{Arsenoflorencite-(Nd)} x r_electron= 522.69 barns/cc.

Radioactivity:

GRapi = 20,907.02 (Gamma Ray American Petroleum Institute Units)
Concentration of Arsenoflorencite-(Nd) per GRapi unit = 47.83 (PPM)

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

**Estimated Radioactivity from Arsenoflorencite-(Nd)** - 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 / 7.75 cm	469,025	1.27E-05	20,907.02	6.87
100 gm / 3.60 cm	46,903	1.27E-06	2,090.70	0.69
10 gm / 1.67 cm	4,690	1.27E-07	209.07	0.07
1 gm / 7.75 mm	469	1.27E-08	20.91	0.01
0.1 gm / 3.60 mm	47	1.27E-09	2.09	0.00
0.01 gm / 1.67 mm	5	1.27E-10	0.21	0.00
0.001 gm / 0.78 mm	0	1.27E-11	0.02	0.00

Weight of pure Arsenoflorencite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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 ( 1.05 % Th) From Sum REE Elements (20.94 % REE)

Arsenoflorencite-(Nd) Classification

Dana Class:

41.05.11.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.05)where (A B)2 (XO4) Zq

(41.05.11)Arsenoflorencite Group

41.05.11.01 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m

41.05.11.02 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m

41.05.11.03 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m

41.05.11.04 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m

Strunz Class:

08.BL.13 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1

08.BL.13 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m

08.BL.13 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m

08.BL.13 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m

08.BL.13 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m

08.BL.13 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m

08.BL.13 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

08.BL.13 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m

08.BL.13 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m

08.BL.13 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m

08.BL.13 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m

Other Arsenoflorencite-(Nd) Information

References:

PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Arsenoflorencite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Arsenoflorencite-(Nd)

(Nd,La,Ce,Ba)(Al,Fe+++)3(AsO4,PO4)2(OH)6
Dana No: 41.05.11.02 Strunz No: 08.BL.13
Locality:

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