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Ancylite-(La) Mineral Data

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General Ancylite-(La) Information

Help on Chemical  Formula: Chemical Formula: Sr(La,Ce)(CO3)2(OH)•(H2O)
Help on Composition: Composition: Molecular Weight = 381.87 gm
   Strontium  22.95 %  Sr   27.13 % SrO
   Lanthanum  27.28 %  La   31.99 % La2O3
   Cerium      9.17 %  Ce   10.74 % Ce2O3
   Hydrogen    0.79 %  H     7.08 % H2O
   Carbon      6.29 %  C    23.05 % CO2
   Oxygen     33.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SrLa0.75Ce0.25(CO3)2(OH)•(H2O)
Help on Environment: Environment: In hydrothermal veins in nepheline syenites.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Marchenko Peak, Mount Kukisvumchorr, Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and from the Greek "curved," in allusion to the rounded and distorted character of the crystals.
Help on Name Pronunciation: Name Pronunciation: Ancylite-(La) Say ANCYLITE-(LA)
Help on Synonym: Synonym: IMA1995-053

Ancylite-(La) Image

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Comments: Pale brown aggregates of ancylite-(La) crystals with some aegirine on matrix.
Location: Mt. Kukisvumchorr, Chibiny, Kola, Russia. Scale: Specimen Size 2.5x3.5 cm.
© Diederik Visser

Ancylite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5905:1:0.8471
Help on Cell Dimensions: Cell Dimensions: a = 5.072, b = 8.589, c = 7.276, Z = 2; V = 316.97 Den(Calc)= 4.00
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmcn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.955(1), 4.36(0.92), 3.705(0.9),

Physical Properties of Ancylite-(La)

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Yellowish brown.
Help on Density: Density: 3.88
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ancylite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1699,KPDmeas= 0.1752,KC= 0.1749
Ncalc = 1.68 - 1.7
Help on Optical Data: Optical Data: Biaxial (+), a=1.64, b=1.668, g=1.731, bire=0.0910, 2V(Calc)=70, 2V(Meas)=70. Dispersion r < v moderate.

Calculated Properties of Ancylite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Ancylite-(La) =3.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAncylite-(La) = 201.59 barns/electron
U=PEAncylite-(La) x relectron= 713.81 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 35,486.80 (Gamma Ray American Petroleum Institute Units)
Concentration of Ancylite-(La) per GRapi unit = 28.18 (PPM)

Ancylite-(La) 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) 857.13 ±214.28 grams of pure Ancylite-(La) .

Estimated Radioactivity from Ancylite-(La) - weak
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.90 cm 816,578 2.21E-05 35,486.80 11.67
100 gm / 3.66 cm 81,658 2.21E-06 3,548.68 1.17
10 gm / 1.70 cm 8,166 2.21E-07 354.87 0.12
1 gm / 7.90 mm 817 2.21E-08 35.49 0.01
0.1 gm / 3.66 mm 82 2.21E-09 3.55 0.00
0.01 gm / 1.70 mm 8 2.21E-10 0.35 0.00
0.001 gm / 0.79 mm 1 2.21E-11 0.04 0.00

Weight of pure Ancylite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.88 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 ( 1.82 % Th) From Sum REE Elements (36.45 % REE)

Ancylite-(La) Classification

Help on  Dana Class: Dana Class: 16b.01.01.05 (16b)Carbonates - Hydroxyl or Halogen
  (16b.01)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1
  (16b.01.01)Ancylite group
16b.01.01.01 Ancylite-(Ce) SrCe(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
16b.01.01.02 Calcioancylite-(Ce) CaCe(CO3)2(OH)•(H2O) P mmm 2/m 2/m 2/m
16b.01.01.03 Calcioancylite-(Nd) CaNd(CO3)2(OH)•(H2O) Pm m
16b.01.01.04 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
16b.01.01.05 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
16b.01.01.06 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m
16b.01.01.07 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DC.05 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DC -With large cations
05.DC.05 Ancylite-(Ce) SrCe(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
05.DC.05 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
05.DC.05 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m
05.DC.05 Calcioancylite-(Ce) CaCe(CO3)2(OH)•(H2O) P mmm 2/m 2/m 2/m
05.DC.05 Calcioancylite-(Nd) CaNd(CO3)2(OH)•(H2O) Pm m
05.DC.05 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m
05.DC.05 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

Other Ancylite-(La) Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p652,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Ancylite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals

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Dana No: 16b.01.01.05 Strunz No: 05.DC.05





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