Churchite-(Nd) Mineral Data

Advertisment

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

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

Search for Churchite-(Nd) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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 Becquerels (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 · 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

Search for Churchite-(Nd) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Churchite-(Nd) :

A Bijoux Google Search for Churchite-(Nd)
Adam's Minerals Google Search for Churchite-(Nd)
Cape Minerals Google Search for Churchite-(Nd)
Dakota Matrix Minerals Google Search for Churchite-(Nd)
Excalibur Mineral Corp. Google Search for Churchite-(Nd)
Exceptional Minerals Google Search for Churchite-(Nd)
John Betts Fine Minerals Search for Churchite-(Nd)
McDougall Minerals Google Search for Churchite-(Nd)
Mineral News Website Link
Rock and Mineral Shows Google Search for Churchite-(Nd)
Weinrich Minerals, Inc. Google Search for Churchite-(Nd)

Ask about Churchite-(Nd) 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 Churchite-(Nd) Specimen Label here :

Churchite-(Nd)

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

Notes: