Srebrodolskite Mineral Data

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General Srebrodolskite Information

Chemical Formula:

Ca2Fe+++2O5

Composition:

Molecular Weight = 271.85 gm

Calcium 29.49 % Ca 41.26 % CaO

Iron 41.09 % Fe 58.74 % Fe₂O₃

Oxygen 29.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Fe³⁺₂O₅

Environment:

Calcined ankerite in petrified wood baked by burning coal heaps.

IMA Status:

Approved IMA 1985

Locality:

Mines around Kopeysk, Chelyabinsk coal basin, Southern Ural Mountains, Russia Link to MinDat.org Location Data.

Name Origin:

Named for Boris Ivanovich Srebrodolskii (1927- ), Russian-Ukrainian mineralogist, Institute of Geology and Geochemistry, Lvov, Ukraine.

Name Pronunciation:

Srebrodolskite + Pronunciation

Synonym:

ICSD 14296

PDF 47-1744

Srebrodolskite Image

Images:

Click Here for Larger Srebrodolskite Image

Srebrodolskite Periclase

Comments: Black grains of srebrodolskite with white periclase.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Srebrodolskite Kumtyubeite Wadalite Rondorfite

Comments: BSE image of kumtyubeite (Kmt) associated with srebrodolskite (Srb), bultfonteinite (Blt), Ca- kydrosilicates, wadalite (Wad), rondorfite (Rndr), and ettringite (dark gray). (AmMin, v94:1361).
Location: Rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. Scale: See Image.
© American Mineralogist

Srebrodolskite Crystallography

Axial Ratios:

a:b:c =0.3674:1:0.3792

Cell Dimensions:

a = 5.42, b = 14.752, c = 5.594, Z = 4; V = 447.27 Den(Calc)= 4.04

Crystal System:

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

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

By Intensity(I/I_o): 2.676(1), 3.69(1), 7.381(1),

Crystal Structure:

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Kahlenberg V , Fischer R X , European Journal of Mineralogy , 12 (2000) p.129-135, Crystal growth and cation distribution in doped dicalcium ferrite, Ca2(Fe1-xMex)2O5 (Me=Al,Ga), Sample: Me = Ga

Physical Properties of Srebrodolskite

Color:

Brown red, Black.

Density:

4.04

Diaphaneity:

Subtranslucent

Hardness:

5.5 - Knife Blade

Luster:

Adamantine - Metallic

Optical Properties of Srebrodolskite

Gladstone-Dale:

CI meas= -0.142 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.142 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3102,KPDmeas= 0.3102,KC= 0.2717
Ncalc = 2.1

Optical Data:

Biaxial (-), a=2.24, b=2.25, g=2.27, bire=0.0300

Calculated Properties of Srebrodolskite

Electron Density:

Bulk Density (Electron Density)=3.92 gm/cc
note: Specific Gravity of Srebrodolskite =4.04 gm/cc.

Fermion Index:

Fermion Index = 0.009249769
Boson Index = 0.990750231

Photoelectric:

PE_{Srebrodolskite}= 16.02 barns/electron
U=PE_{Srebrodolskite} x rElectron Density= 62.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Srebrodolskite is Not Radioactive

Srebrodolskite Classification

Dana Class:

07.11.02.02 (07)Multiple Oxides

(07.11)as titano-oxides with [4] and [6] substitutions

(07.11.02)Dana Group

07.11.02.01 Brownmillerite Ca2(Al,Fe)2O5 Ibmm 2/m 2/m 2/m

07.11.02.02 Srebrodolskite Ca2Fe2O5 P nma 2/m 2/m 2/m

Strunz Class:

04.AC.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.A - Metal:Oxygen = 2.1 and 1:1

04.AC -M:O = 1:1 (and up to 1:1.25); with large cations (± smaller ones)

04.AC.10 Brownmillerite Ca2(Al,Fe)2O5 Ibmm 2/m 2/m 2/m

04.AC.10 Srebrodolskite Ca2Fe2O5 P nma 2/m 2/m 2/m

Other Srebrodolskite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Srebrodolskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Srebrodolskite

Ca2Fe+++2O5
Dana No: 07.11.02.02 Strunz No: 04.AC.10
Locality:

Notes: