IMA2003-017 Mineral Data

IMA2003-017 Mineral Data

General IMA2003-017 Information

Chemical Formula:

(REE,Ca)4(Fe+++,Ti,Fe++,[ ])(Ti,Fe+++,Fe++,Nb)4Si4O22

Composition:

Molecular Weight = 1,228.90 gm

Calcium 3.26 % Ca 4.56 % CaO

La,Ce,Pr,Nd,Sm, 35.15 % RE 41.01 % REE₂O₃

Titanium 8.96 % Ti 14.95 % TiO₂

Niobium 3.02 % Nb 4.33 % Nb₂O₅

Iron 11.82 % Fe 4.68 % FeO / 11.70 % Fe₂O₃

Silicon 9.14 % Si 19.56 % SiO₂

Oxygen 28.64 % O

______ ______

100.00 % 100.78 % = TOTAL OXIDE

Empirical Formula:

REE₃CaFe³⁺_0.6Ti_0.3Ti₂Fe³⁺_1.2Fe²⁺_0.8Nb_0.4Si₄O₂₂

Environment:

Fe-dominant analogue of polyakovite-(Ce)

IMA Status:

Proposed IMA 2003 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2003-017 Crystallography

Axial Ratios:

a:b:c =2.331:1:1.9259

Cell Dimensions:

a = 13.385, b = 5.742, c = 11.059, Z = 2; beta = 100.6° V = 835.45 Den(Calc)= 4.88

Crystal System:

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

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

By Intensity(I/I_o): 2.722(1), 3.49(0.8), 2.76(0.4),2.874(0.4), 3.004(0.4), 4.89(0.35),

Physical Properties of IMA2003-017

Color:

Black, Brownish black.

Diaphaniety:

Opaque

Luster:

Sub Metallic

Optical Properties of IMA2003-017

Gladstone-Dale:

CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1954,KC= 0.2109

Optical Data:

Biaxial (-), a=1.937, g=1.97, bire=0.0330

RL Anisotrophism:

Strong.

RL Bireflectance:

Weak.

RL Color:

Gray with yellowish gray internal reflections.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of IMA2003-017 in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	12.50	14.60
546 nm	12.10	14.40
589 nm	12.10	14.30
650 nm	11.20	13.70

**Calculated Relative Intensity Colors of IMA2003-017 in Air**
Relative Intensity	0%	80%	100%	160%	240%	320%	400%	480%	560%	640%	720%	750%
R₁
R₂

Calculated Properties of IMA2003-017

Electron Density:

r_electron=4.52 gm/cc
note: r_IMA2003-017=4.88 gm/cc.

Fermion Index

Fermion Index = 0.08394
Boson Index = 0.91606

Photoelectric:

PE_IMA2003-017= 225.48 barns/electron
U=PE_IMA2003-017 x r_electron=1,020.01 barns/cc.

Radioactivity:

GRapi = 34,884.97 (Gamma Ray American Petroleum Institute Units)

IMA2003-017 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) 871.91 ±217.98 grams of pure IMA2003-017 .

**Estimated Radioactivity from IMA2003-017** - 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 / 7.31 cm	790,265	2.14E-05	34,884.97	11.47
100 gm / 3.40 cm	79,027	2.14E-06	3,488.50	1.15
10 gm / 1.58 cm	7,903	2.14E-07	348.85	0.11
1 gm / 7.31 mm	790	2.14E-08	34.88	0.01
0.1 gm / 3.40 mm	79	2.14E-09	3.49	0.00
0.01 gm / 1.58 mm	8	2.14E-10	0.35	0.00
0.001 gm / 0.73 mm	1	2.14E-11	0.03	0.00

Weight of pure IMA2003-017 in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.88 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 ( 1.76 % Th) From Sum REE Elements (35.15 % REE)

IMA2003-017 Classification

Dana Class:

56.2.8.8 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.2)with cations in [4] and/or >[4] coordination

(56.2.8)Perierite - Chevkinite group

56.2.8.1 Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m

56.2.8.2 Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

56.2.8.3 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m

56.2.8.4 Orthochevkinite* (Ce,La,Ca,Na,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 Unk Ortho

56.2.8.5 Rengeite! Sr4ZrTi4Si4O22 P 2₁/a 2/m

56.2.8.6 Matsubaraite! Sr4TiTi4Si4O22 P 2₁/a 2/m

56.2.8.7 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m

56.2.8.8 IMA2003-017 ! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m

Strunz Class:

VIII/CX.00-00 VIII - Silicates

VIII/CX - Unclassified Strunz Sorosilicates

VIII/CX.00 - Perrierite Group

Other IMA2003-017 Information

See Also:

Links to other databases for IMA2003-017 :
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)

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Print or Cut-and-Paste your IMA2003-017 Specimen Label here :

IMA2003-017

(REE,Ca)4(Fe+++,Ti,Fe++,[ ])(Ti,Fe+++,Fe++,Nb)4Si4O22
Dana No: 56.2.8.8 Strunz No: VIII/CX.00-00
Locality:

Notes: