Mineralogy Database

Churchite-(Nd) Mineral Data

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General Churchite-(Nd) Information

Help on Chemical  Formula: Chemical Formula: Nd(PO4)•2(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Nd(PO4)•2(H2O)
Help on Environment: Environment: Proposed analogue of churchite with Nd as the dominant cation.
Help on IMA Status: IMA Status: Not Approved IMA (Dana # Added)
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arthur Hubert Church (1834-1915, English chemist who described and analyzed the mineral.
Help on Name Pronunciation: Name Pronunciation: Churchite-(Nd) + Pronunciation Say CHURCHITE-(ND)

Churchite-(Nd) Crystallography

Help on Crystal System: Crystal System: Monoclinic

Physical Properties of Churchite-(Nd)

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Yellowish white, Pink white.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Churchite-(Nd)

Help on Optical Data: Optical Data:

Calculated Properties of Churchite-(Nd)

Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEChurchite-(Nd) = 298.27 barns/electron
U=PEChurchite-(Nd) x relectron= . barns/cc.
Help on Radioactivity: 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
Curies (Ci)
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

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.04)where A+++ XO4 � x(H2O)
  (40.04.06)Dana Group Churchite-(Y) YPO4•2(H2O) A2/a,Aa Mono Churchite-(Nd)! Nd(PO4)•2(H2O) Mono
Help on  Strunz Class: 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

Help on See Also: 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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Dana No: Strunz No: 08.CJ.50