Ancylite-(La) Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

General Ancylite-(La) Information

Chemical Formula:

Sr(La,Ce)(CO3)2(OH)•(H2O)

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

Empirical Formula:

SrLa_0.75Ce_0.25(CO₃)₂(OH)•(H₂O)

Environment:

In hydrothermal veins in nepheline syenites.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Marchenko Peak, Mount Kukisvumchorr, Khibina massif, Kola Peninsula, Russia. 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.

Name Pronunciation:

Ancylite-(La)

Synonym:

IMA1995-053

Ancylite-(La) Image

Images:

Ancylite-(La)

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

Axial Ratios:

a:b:c =0.5905:1:0.8471

Cell Dimensions:

a = 5.072, b = 8.589, c = 7.276, Z = 2; V = 316.97 Den(Calc)= 4.00

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): 2.955(1), 4.36(0.92), 3.705(0.9),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Petersen O V , Niedermayr G , Gault R A , Brandstatter F , Micheelsen H I , Giester G , Neues Jahrbuch fur Mineralogie, Monatshefte , 2001 (2001) p.493-504, Ancylite-(La) from the Ilimaussaq alkaline complex, South Greenland, Locality: Ilimaussaq alkaline complex, South Greenland

Physical Properties of Ancylite-(La)

Cleavage:

None

Color:

Yellow, Yellowish brown.

Density:

3.88

Diaphaneity:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

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

Habit:

Pyramidal - Crystals are shaped like pyramids.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ancylite-(La)

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

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)

Electron Density:

Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Ancylite-(La) =3.88 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ancylite-(La)}= 201.59 barns/electron
U=PE_{Ancylite-(La)} x r_electron= 713.81 barns/cc.

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
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 / 7.90 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

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

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

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p652,1998) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Ancylite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals
12 - WWW-MINCRYST

Search for Ancylite-(La) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ancylite-(La) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Ancylite-(La) Mineral Data :

Ask about Ancylite-(La) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Ancylite-(La) Specimen Label here :

Ancylite-(La)

Sr(La,Ce)(CO3)2(OH)•(H2O)
Dana No: 16b.01.01.05 Strunz No: 05.DC.05
Locality:

Notes: