Ancylite-(Ce) Mineral Data

Ancylite-(Ce) Mineral Data +

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General Ancylite-(Ce) Information

Chemical Formula:

SrCe(CO3)2(OH)·(H2O)

Composition:

Molecular Weight = 382.78 gm

Strontium 22.89 % Sr 27.07 % SrO

Cerium 36.60 % Ce 42.87 % Ce₂O₃

Hydrogen 0.79 % H 7.06 % H₂O

Carbon 6.28 % C 23.00 % CO₂

Oxygen 33.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

SrCe(CO₃)₂(OH)·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1899

Locality:

Narsarsuk, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for the composition and from the Greek "curved," in allusion to the rounded and distorted character of the crystals.

Synonym:

ICSD 4242

PDF 29-384

Ancylite-(Ce) Image

Images:

Ancylite-(Ce)

Comments: Pinkish brown ancylite-(Ce) blades.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ancylite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.5896:1:0.8546

Cell Dimensions:

a = 5.03, b = 8.53, c = 7.29, Z = 2; V = 312.78 Den(Calc)= 4.06

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmcn

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

By Intensity(I/I_o): 2.96(1), 3.71(1), 4.34(1),

Forms:

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Crystal Structure:

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Dal Negro A , Rossi G , Tazzoli V , American Mineralogist , 60 (1975) p.280-284, The crystal structure of ancylite, (RE)x(Ca,Sr)2-x(CO3)2(OH)x*(2-x)H2O

Physical Properties of Ancylite-(Ce)

Cleavage:

None

Color:

Brown, Brown red, Colorless, Gray, Gray pink.

Density:

3.9

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Pyramidal - Crystals are shaped like pyramids.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Ancylite-(Ce)

Gladstone-Dale:

CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1691,KPDmeas= 0.1761,KC= 0.1735

Optical Data:

Biaxial (-), a=1.625, b=1.7, g=1.735, bire=0.1100, 2V(Calc)=66, 2V(Meas)=66.

Calculated Properties of Ancylite-(Ce)

Electron Density:

r_electron=3.57 gm/cc
note: r_{Ancylite-(Ce)}=3.90 gm/cc.

Fermion Index

Fermion Index = 0.01687
Boson Index = 0.98313

Photoelectric:

PE_{Ancylite-(Ce)}= 211.38 barns/electron
U=PE_{Ancylite-(Ce)} x r_electron= 753.79 barns/cc.

Radioactivity:

GRapi = 35,701.94 (Gamma Ray American Petroleum Institute Units)

Ancylite-(Ce) 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) 851.96 ±212.99 grams of pure Ancylite-(Ce) .

**Estimated Radioactivity from Ancylite-(Ce)** - 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 / 7.88 cm	819,951	2.22E-05	35,701.94	11.74
100 gm / 3.66 cm	81,995	2.22E-06	3,570.19	1.17
10 gm / 1.70 cm	8,200	2.22E-07	357.02	0.12
1 gm / 7.88 mm	820	2.22E-08	35.70	0.01
0.1 gm / 3.66 mm	82	2.22E-09	3.57	0.00
0.01 gm / 1.70 mm	8	2.22E-10	0.36	0.00
0.001 gm / 0.79 mm	1	2.22E-11	0.04	0.00

Weight of pure Ancylite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.90 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 ( 1.83 % Th) From Sum REE Elements (36.60 % REE)

Ancylite-(Ce) Classification

Dana Class:

16b.1.1.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.1)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1

(16b.1.1)Ancylite group

16b.1.1.1 Ancylite-(Ce) SrCe(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

16b.1.1.2 Calcio-ancylite-(Ce) CaCe(CO3)2(OH)·(H2O) P mmm 2/m 2/m 2/m

16b.1.1.3 Calcio-ancylite-(Nd) CaNd(CO3)2(OH)·(H2O) Pm m

16b.1.1.4 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

16b.1.1.5 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

16b.1.1.6 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

16b.1.1.7 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m

Strunz Class:

V/E.08-30 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.08 - Strontiodresserite - Dundasite series

V/E.08-05 Thomasclarkite-(Y)! (Na,Ce)(Y,REE)(HCO3)(OH)3·4(H2O) P 2 2

V/E.08-10 Kamphaugite-(Y) Ca(Y,REE)(CO3)2(OH)2·3(H2O) P 4₁2₁2 4 2 2

V/E.08-20 Calcio-ancylite-(Ce) CaCe(CO3)2(OH)·(H2O) P mmm 2/m 2/m 2/m

V/E.08-25 Calcio-ancylite-(Nd) CaNd(CO3)2(OH)·(H2O) Pm m

V/E.08-28 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-30 Ancylite-(Ce) SrCe(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-40 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)·(H2O) Pmcn 2/m 2/m 2/m

V/E.08-50 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-60 Dresserite BaAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-70 Hydrodresserite BaAl2(CO3)2(OH)4·3(H2O) P1 1

V/E.08-80 Montroyalite Sr4Al8(CO3)3(OH,F)26·10-11(H2O) Unk. Tri

V/E.08-90 Dundasite PbAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

V/E.08-95 Petterdite! PbCr2(CO3)2(OH)4·H2O Pbnm 2/m 2/m 2/m

V/E.08-100 Barstowite Pb4(CO3)Cl6·(H2O) P 2₁/m 2/m

Other Ancylite-(Ce) Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Ancylite-(Ce) :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - Uranium Minerals

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Ancylite-(Ce)

SrCe(CO3)2(OH)·(H2O)
Dana No: 16b.1.1.1 Strunz No: V/E.08-30
Locality:

Notes: