Churchite-(Nd) Mineral Data

Churchite-(Nd) Mineral Data +

[Mineral Specimens] [Mineral Locations] [About Us] [Search] [Register]
Greenside Minerals
Newest website on the Internet for top quality, affordable minerals from around the World
We specialize in minerals from the UK and Ireland

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.

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.

Diaphaniety:

Transparent

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Pearly

Streak:

white

Calculated Properties of Churchite-(Nd)

Fermion Index

Fermion Index = 0.10749
Boson Index = 0.89251

Photoelectric:

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

Radioactivity:

GRapi = 51,584.47 (Gamma Ray American Petroleum Institute Units)

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	51,584.47	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:

40.4.6.2 (40)Hydrated Phosphates, etc

(40.4)where A+++ XO4 · x(H2O)

(40.4.6)Dana Group

40.4.6.1 Churchite-(Y) YPO4·2(H2O) A2/a,Aa Mono

40.4.6.2 Churchite-(Nd) ! Nd(PO4)·2(H2O) Mono

Strunz Class:

VII/C.25-40 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.25 - Brushite - Churchite-(Dy) series

VII/C.25-10 Brushite CaHPO4·2(H2O) I2/a 2/m

VII/C.25-20 Pharmacolite CaHAsO4·2(H2O) Ia m

VII/C.25-30 Churchite-(Y) YPO4·2(H2O) A2/a,Aa Mono

VII/C.25-40 Churchite-(Nd) Nd(PO4)·2(H2O) Mono

VII/C.25-50 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)·2(H2O) Mono

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

Search for Churchite-(Nd) using:

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

Visit our Advertisers for Churchite-(Nd) :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Churchite-(Nd) Mineral Data :

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: 40.4.6.2 Strunz No: VII/C.25-40
Locality:

Notes: