Synchysite-(Nd) Mineral Data

Synchysite-(Nd) Mineral Data +

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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 "confounding" having been mistaken for parisite and for the Nd end-member of the series.

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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

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:

r_electron=3.88 gm/cc
note: r_{Synchysite-(Nd)}=4.21 gm/cc.

Fermion Index

Fermion Index = 0.09248
Boson Index = 0.90752

Photoelectric:

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

Radioactivity:

GRapi = 43,855.65 (Gamma Ray American Petroleum Institute Units)

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 Bequerols (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	43,855.65	14.42
100 gm / 3.57 cm	99,927	2.70E-06	4,385.56	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.1.3.3 (16a)Carbonates - Hydroxyl or Halogen

(16a.1)in the Bastnasite/Shynchysite/Parasite Groups

(16a.1.3)Synchysite Subgroup

16a.1.3.1 Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m

16a.1.3.2 Synchysite-(Y) CaY(CO3)2F C 2/c 2/m

16a.1.3.3 Synchysite-(Nd) CaNd(CO3)2F Unk Ortho

Strunz Class:

V/C.07-120 V - Nitrates, Carbonates and Borates

V/C - Waterfree carbonates with unfamiliar anions

V/C.07 - Bastnäsite-(Y) - Mineevite-(Y) series

V/C.07-10 Bastnasite-(Y) Y(CO3)F P 62c 6 m2

V/C.07-20 Bastnasite-(La) La(CO3)F P 62c 6 m2

V/C.07-30 Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2

V/C.07-40 Hydroxylbastnasite-(La) La(CO3)(OH) C 222₁ 2 2 2

V/C.07-50 Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2

V/C.07-60 Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2

V/C.07-61 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

V/C.07-62 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m

V/C.07-64 Horvathite-(Y)! NaY(CO3)F2 Pmcn 2/m 2/m 2/m

V/C.07-70 Parisite-(Ce) Ca(Ce,La)2(CO3)3F2 R 3 3

V/C.07-80 Parisite-(Nd) Ca(Nd,Ce,La)2(CO3)3F2 R 3 3

V/C.07-90 Rontgenite-(Ce) Ca2(Ce,La)3(CO3)5F3 R 3 3

V/C.07-100 Synchysite-(Y) CaY(CO3)2F C 2/c 2/m

V/C.07-110 Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m

V/C.07-120 Synchysite-(Nd) CaNd(CO3)2F Unk Ortho

V/C.07-130 Huanghoite-(Ce) BaCe(CO3)2F R 3m 3 2/m

V/C.07-140 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono

V/C.07-150 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono

V/C.07-154 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

V/C.07-155 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

V/C.07-160 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

V/C.07-170 Cordylite-(Ce) Ba(Ce,La)2(CO3)3F2 P 6₃/mmc 6/m 2/m 2/m

V/C.07-175 Lukechangite-(Ce)! Na3Ce2(CO3)4F P 6₃/mmc 6/m 2/m 2/m

V/C.07-190 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 6₃/m 6/m

V/C.07-200 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6

V/C.07-210 Micheelsenite! (Ca,Y)3Al[PO3OH,CO3](CO3)(OH)6·12(H2O) P 6₃ 6

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Synchysite-(Nd)

CaNd(CO3)2F
Dana No: 16a.1.3.3 Strunz No: V/C.07-120
Locality:

Notes: