Churchite-(Nd) Mineral Data

General Churchite-(Nd) Information

Chemical Formula:

Nd(PO4)•2(H2O)

Composition:

Molecular Weight = 275.24 gm

Phosphorus 11.25 % P 25.79 % P₂O₅

Hydrogen 1.46 % H 13.09 % H₂O

Neodymium 52.40 % Nd 61.12 % Nd₂O₃

Oxygen 34.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Nd(PO₄)•2(H₂O)

Environment:

Proposed analogue of churchite with Nd as the dominant cation.

IMA Status:

Not Approved IMA (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named for Arthur Hubert Church (1834-1915, English chemist who described and analyzed the mineral.

Name Pronunciation:

Churchite-(Nd) + Pronunciation

Churchite-(Nd) Crystallography

Crystal System:

Monoclinic

Physical Properties of Churchite-(Nd)

Cleavage:

{???} Perfect

Color:

Yellowish white, Pink white.

Diaphaneity:

Transparent

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Churchite-(Nd)

Optical Data:

Calculated Properties of Churchite-(Nd)

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_{Churchite-(Nd)}= 298.27 barns/electron
U=PE_{Churchite-(Nd)} x r_electron= . barns/cc.

Radioactivity:

GRapi = 51,584.49 (Gamma Ray American Petroleum Institute Units)
Concentration of Churchite-(Nd) per GRapi unit = 19.39 (PPM)

Churchite-(Nd) 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) 589.65 ±147.41 grams of pure Churchite-(Nd) .

**Estimated Radioactivity from Churchite-(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	1,173,868	3.17E-05	51,584.49	16.96
100 gm	117,387	3.17E-06	5,158.45	1.70
10 gm	11,739	3.17E-07	515.84	0.17
1 gm	1,174	3.17E-08	51.58	0.02
0.1 gm	117	3.17E-09	5.16	0.00
0.01 gm	12	3.17E-10	0.52	0.00
0.001 gm	1	3.17E-11	0.05	0.00

Weight of pure Churchite-(Nd) in grams (gm).*
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 ( 2.62 % Th) From Sum REE Elements (52.40 % REE)

Churchite-(Nd) Classification

Dana Class:

40.04.06.02 (40)Hydrated Phosphates, etc

(40.04)where A+++ XO4 ï¿½ x(H2O)

(40.04.06)Dana Group

40.04.06.01 Churchite-(Y) YPO4•2(H2O) A2/a,Aa Mono

40.04.06.02 Churchite-(Nd)! Nd(PO4)•2(H2O) Mono

Strunz Class:

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

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.50 Ardealite Ca2(SO4)(HPO4)•4(H2O) Cc m

08.CJ.50 Brushite CaHPO4•2(H2O) I2/a 2/m

08.CJ.50 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono

08.CJ.50 Churchite-(Nd)! Nd(PO4)•2(H2O) Mono

08.CJ.50 Churchite-(Y) YPO4•2(H2O) A2/a,Aa Mono

08.CJ.50 Pharmacolite CaHAsO4•2(H2O) Ia m

Other Churchite-(Nd) Information

See Also:

Links to other databases for Churchite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Churchite-(Nd) Specimen Label here :

Churchite-(Nd)

Nd(PO4)•2(H2O)
Dana No: 40.04.06.02 Strunz No: 08.CJ.50
Locality:

Notes: