Xiangjiangite Mineral Data

Xiangjiangite Mineral Data +

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General Xiangjiangite Information

Chemical Formula:

(Fe+++,Al)(UO2)4(PO4)2(SO4)2(OH)·22(H2O)

Composition:

Molecular Weight = 1,916.94 gm

Uranium 49.67 % U 56.35 % UO₂

Aluminum 0.70 % Al 1.33 % Al₂O₃

Iron 1.46 % Fe 2.08 % Fe₂O₃

Phosphorus 3.23 % P 7.40 % P₂O₅

Hydrogen 2.37 % H 21.15 % H₂O

Sulfur 3.35 % S 8.35 % SO₃

Oxygen 39.23 % O

______ ______

100.00 % 96.66 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_0.5Al_0.5(UO₂)₄(PO₄)₂(SO₄)₂(OH)·22(H₂O)

IMA Status:

Approved IMA 1978

Locality:

Xiangjiang River, Hunan, China. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

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Xiangjiangite Crystallography

Axial Ratios:

a:b:c =0.9661:1:1.8335

Cell Dimensions:

a = 12.54, b = 12.98, c = 23.8, Z = 4; beta = 108.6° V = 3,671.57 Den(Calc)= 3.47

Crystal System:

MonoclinicSpace Group: C 2/c or Cc

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

By Intensity(I/I_o): 11.11(1), 3.29(0.8), 3.74(0.8),

Physical Properties of Xiangjiangite

Color:

Yellow, Bright yellow.

Density:

2.9 - 3.1, Average = 3

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Silky

Streak:

light yellow

Optical Properties of Xiangjiangite

Gladstone-Dale:

CI meas= -0.157 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1659,KPDmeas= 0.1919,KC= 0.1659

Optical Data:

Biaxial (-), a=1.558, b=1.576, g=1.593, bire=0.0350, 2V(Calc)=86, 2V(Meas)=87.

Pleochroism (x):

yellow.

Pleochroism (y):

yellow.

Pleochroism (z):

weak yellow.

Calculated Properties of Xiangjiangite

Electron Density:

r_electron=3.15 gm/cc
note: r_{Xiangjiangite}=3.47 gm/cc.

Fermion Index

Fermion Index = 0.00432
Boson Index = 0.99568

Photoelectric:

PE_{Xiangjiangite}=1,241.69 barns/electron
U=PE_{Xiangjiangite} x r_electron=3,913.21 barns/cc.

Radioactivity:

GRapi = 3,845,082.52 (Gamma Ray American Petroleum Institute Units)

Xiangjiangite 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) 7.91 ± 1.98 grams of pure Xiangjiangite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 791.05 ±197.76 grams of pure Xiangjiangite .

**Estimated Radioactivity from Xiangjiangite** - very strong
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 / 8.20 cm	88,906,705	2.40E-03	3,845,082.52	1,264.14
100 gm / 3.80 cm	8,890,671	2.40E-04	384,508.25	126.41
10 gm / 1.77 cm	889,067	2.40E-05	38,450.83	12.64
1 gm / 8.20 mm	88,907	2.40E-06	3,845.08	1.26
0.1 gm / 3.80 mm	8,891	2.40E-07	384.51	0.13
0.01 gm / 1.77 mm	889	2.40E-08	38.45	0.01
0.001 gm / 0.82 mm	89	2.40E-09	3.85	0.00

Weight of pure Xiangjiangite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.47 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

Xiangjiangite Classification

Dana Class:

43.5.6.1 (43)Compound Phosphates, etc.

(43.5)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.5.6)Dana Group

43.5.6.1 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)·22(H2O) C 2/c or Cc Mono

Strunz Class:

VII/E.06-30 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.06 - Vochtenite - Xiangjianite series

VII/E.06-10 Vochtenite (Fe,Mg)Fe[(UO2)(PO4)]4(OH)·12-13(H2O) Unk Mono

VII/E.06-20 Coconinoite Fe2Al2(UO2)2(PO4)4(SO4)(OH)2·18(H2O) C 2/c,Cc Mono

VII/E.06-30 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)·22(H2O) C 2/c or Cc Mono

Other Xiangjiangite Information

References:

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

See Also:

Links to other databases for Xiangjiangite :
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 - Uranium Minerals 13 -École des Mines de Paris

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

Xiangjiangite

(Fe+++,Al)(UO2)4(PO4)2(SO4)2(OH)·22(H2O)
Dana No: 43.5.6.1 Strunz No: VII/E.06-30
Locality:

Notes: