Synchysite-(Nd) Mineral Data

General Synchysite-(Nd) Information

Chemical Formula:

CaNd(CO3)2F

Composition:

Molecular Weight = 323.33 gm

Calcium 12.40 % Ca 17.34 % CaO

Carbon 7.43 % C 27.22 % CO₂

Neodymium 44.61 % Nd 52.03 % Nd₂O₃

Oxygen 29.69 % O

Fluorine 5.88 % F 5.88 % F

- % F -2.47 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaNd(CO₃)₂F

IMA Status:

Approved IMA 1978

Locality:

Straz block, Holicky deposit, Ceska Lepa, Bohimia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for the Nd end-member of the Synchysite-(Ce) series.

Name Pronunciation:

Synchysite-(Nd) + Pronunciation

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Synchysite-(Nd) Crystallography

Axial Ratios:

a:b:c =0.5783:1:1.2951

Cell Dimensions:

a = 4.039, b = 6.984, c = 9.045, Z = 2; V = 255.14 Den(Calc)= 4.21

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 4.52(1), 9.04(0.6), 2.77(0.35),

Physical Properties of Synchysite-(Nd)

Cleavage:

None

Color:

Light violet, Light gray blue.

Density:

4.21

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

4.5 - Between Fluorite and Apatite

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Synchysite-(Nd)

Gladstone-Dale:

CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1591,KPDmeas= 0.1591,KC= 0.1679
Ncalc = 1.71

Optical Data:

Biaxial (+), a=1.61, b=1.66, g=1.74, bire=0.1300

Pleochroism (x):

light violet.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Synchysite-(Nd)

Electron Density:

Bulk Density (Electron Density)=3.88 gm/cc
note: Specific Gravity of Synchysite-(Nd) =4.21 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_{Synchysite-(Nd)}= 255.48 barns/electron
U=PE_{Synchysite-(Nd)} x r_electron= 991.28 barns/cc.

Radioactivity:

GRapi = 43,855.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Synchysite-(Nd) per GRapi unit = 22.80 (PPM)

Synchysite-(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) 693.56 ±173.39 grams of pure Synchysite-(Nd) .

**Estimated Radioactivity from Synchysite-(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 / 7.68 cm	999,266	2.70E-05	43,855.66	14.42
100 gm / 3.57 cm	99,927	2.70E-06	4,385.57	1.44
10 gm / 1.66 cm	9,993	2.70E-07	438.56	0.14
1 gm / 7.68 mm	999	2.70E-08	43.86	0.01
0.1 gm / 3.57 mm	100	2.70E-09	4.39	0.00
0.01 gm / 1.66 mm	10	2.70E-10	0.44	0.00
0.001 gm / 0.77 mm	1	2.70E-11	0.04	0.00

Weight of pure Synchysite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.21 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
Estimated Thorium Activity ( 2.23 % Th) From Sum REE Elements (44.61 % REE)

Synchysite-(Nd) Classification

Dana Class:

16a.01.03.03 (16a)Carbonates - Hydroxyl or Halogen

(16a.01)in the Bastnasite/Shynchysite/Parasite Groups

(16a.01.03)Synchysite Subgroup

16a.01.03.01 Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m

16a.01.03.02 Synchysite-(Y) CaY(CO3)2F C 2/c 2/m

16a.01.03.03 Synchysite-(Nd) CaNd(CO3)2F Unk Ortho

Strunz Class:

05.BD.20c 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BD -With rare-earth elements (REE)

05.BD.20c Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m

05.BD.20c Synchysite-(Nd) CaNd(CO3)2F Unk Ortho

05.BD.20c Synchysite-(Y) CaY(CO3)2F C 2/c 2/m

Other Synchysite-(Nd) Information

References:

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

See Also:

Links to other databases for Synchysite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Synchysite-(Nd)

CaNd(CO3)2F
Dana No: 16a.01.03.03 Strunz No: 05.BD.20c
Locality:

Notes: