Vastmanlandite-(Ce) Mineral Data

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General Vastmanlandite-(Ce) Information

Chemical Formula:

(Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2

Composition:

Molecular Weight = 1,094.51 gm

Calcium 3.37 % Ca 4.71 % CaO

Lanthanum 11.80 % La 13.84 % La₂O₃

Cerium 20.74 % Ce 24.29 % Ce₂O₃

Praeseodymium 1.80 % Pr 2.11 % Pr₂O₃

Samarium 0.41 % Sm 0.48 % Sm₂O₃

Gadolinium 0.14 % Gd 0.17 % Gd₂O₃

Yttrium 0.16 % Y 0.21 % Y₂O₃

Magnesium 3.38 % Mg 5.60 % MgO

Aluminum 4.63 % Al 8.76 % Al₂O₃

Iron 2.81 % Fe 1.18 % FeO / 2.70 % Fe₂O₃

Silicon 12.68 % Si 27.12 % SiO₂

Phosphorus 0.03 % P 0.06 % P₂O₅

Hydrogen 0.18 % H 1.65 % H₂O

Neodymium 5.53 % Nd 6.46 % Nd₂O₃

Oxygen 31.25 % O

Fluorine 1.08 % F 1.08 % F

- % F -0.45 % -O=F₂

______ ______

100.00 % 99.95 % = TOTAL OXIDE

Empirical Formula:

Ce_1.62La_0.93Nd_0.42Pr_0.14Sm_0.03Y_0.02Gd_0.01Ca_0.92Mg_1.52Fe²⁺_0.18Fe³⁺_0.37Al_1.88Si_4.94 P_0.01O₁₉(OH)₂F_0.62O_0.38

Environment:

Material is from a now abandoned Fe mine, the Malmkärra deposit, which consists of disseminated magnetite-amphibole skarn replacements in marble. Related to epidote group; structure determined.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Lanthanide mineral deposits in Västmanland county, Bergslagen mining region, south-central Sweden. Link to MinDat.org Location Data.

Name Origin:

The name is for Västmanland, the county where the majority of the lanthanide deposits are found.

Synonym:

IMA2002-025

Vastmanlandite-(Ce) Image

Images:

Vastmanlandite-(Ce)

Comments: Brown-black, massive, fine-grained vastmanlandite-(Ce) with fluorbritholithe-(Ce).
Location: Malmkärragruvan, Norberg, Sweden. Scale: Box Size 3 x 4 cm.
© Sonke Stolze / Systematic Minerals

Vastmanlandite-(Ce) Crystallography

Axial Ratios:

a:b:c =1.5665:1:2.7786

Cell Dimensions:

a = 8.939, b = 5.706, c = 15.855, Z = 2; beta = 94.58° V = 806.12 Den(Calc)= 4.51

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 2.9831(1)(114 ), 3.503(0.2)(210 ), 2.625(0.19)(311),15.81(0.16)(001), 2.1874(0.15)(402), 2.6852(0.13)(121),

Crystal Structure:

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Holtstam D , Kolitsch U , Andersson U B , European Journal of Mineralogy , 17 (2005) p.129-141, Vastmanlandite-(Ce) - a new lanthanide- and F-bearing sorosilicate mineral, from Vastmanland, Sweden: description, crystal structure, and relation to gatelite-(Ce), Locality: Vastmanland, Sweden

Physical Properties of Vastmanlandite-(Ce)

Cleavage:

{001} Good

Color:

Dark brown.

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

yellowish gray

Optical Properties of Vastmanlandite-(Ce)

Gladstone-Dale:

CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1761,KC= 0.181
Ncalc = 1.82

Optical Data:

Biaxial (+), a=1.781, b=1.792, g=1.81, bire=0.0290, 2V(Calc)=78, 2V(Meas)=75. Dispersion strong, r > v.

Calculated Properties of Vastmanlandite-(Ce)

Electron Density:

Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Vastmanlandite-(Ce) =4.51 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Vastmanlandite-(Ce)}= 204.98 barns/electron
U=PE_{Vastmanlandite-(Ce)} x r_electron= 856.48 barns/cc.

Radioactivity:

GRapi = 39,982.33 (Gamma Ray American Petroleum Institute Units)
Concentration of Vastmanlandite-(Ce) per GRapi unit = 25.01 (PPM)

Vastmanlandite-(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) 760.75 ±190.19 grams of pure Vastmanlandite-(Ce) .

**Estimated Radioactivity from Vastmanlandite-(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 / 7.51 cm	906,257	2.45E-05	39,982.33	13.14
100 gm / 3.49 cm	90,626	2.45E-06	3,998.23	1.31
10 gm / 1.62 cm	9,063	2.45E-07	399.82	0.13
1 gm / 7.51 mm	906	2.45E-08	39.98	0.01
0.1 gm / 3.49 mm	91	2.45E-09	4.00	0.00
0.01 gm / 1.62 mm	9	2.45E-10	0.40	0.00
0.001 gm / 0.75 mm	1	2.45E-11	0.04	0.00

Weight of pure Vastmanlandite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.51 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 ( 2.02 % Th) From Sum REE Elements (40.43 % REE)

Vastmanlandite-(Ce) Classification

Dana Class:

58.02.01c.08 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)

(58.02.01c)Epidote group (Allanite subgroup)

58.02.01c.01 Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

58.02.01c.02 Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01c.03 Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

58.02.01c.04 Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 2₁/m 2/m

58.02.01c.05 Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 2₁/m 2/m

58.02.01c.06 Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01c.07 Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 2₁/m 2/m

58.02.01c.08 Vastmanlandite-(Ce)! (Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2 P 2₁/m 2/m

58.02.01c.09 Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

58.02.01c.10 Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

Strunz Class:

09.BG.55 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BG.55 Vastmanlandite-(Ce)! (Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2 P 2₁/m 2/m

Other Vastmanlandite-(Ce) Information

References:

NAME( AmMin, v90, p1948) PHYS. PROP.(AmMin, v90, p1948) OPTIC PROP.(AmMin, v90, p1948)

See Also:

Links to other databases for Vastmanlandite-(Ce) :
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

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Vastmanlandite-(Ce)

(Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2
Dana No: 58.02.01c.08 Strunz No: 09.BG.55
Locality:

Notes: