Rusakovite Mineral Data

General Rusakovite Information

Chemical Formula:

(Fe+++,Al)5(VO4,PO4)2(OH)9•3(H2O)

Composition:

Molecular Weight = 670.16 gm

Aluminum 5.03 % Al 9.51 % Al₂O₃

Vanadium 11.40 % V 20.35 % V₂O₅

Iron 31.25 % Fe 44.68 % Fe₂O₃

Phosphorus 2.31 % P 5.30 % P₂O₅

Hydrogen 2.26 % H 20.16 % H₂O

Oxygen 47.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

5(Fe³⁺_0.75)5(Al_0.25)(VO₄)_1.5(PO₄)_0.5(OH)₉•3(H₂O)

Environment:

Found in the oxidized layers of carbonaceous shales with apatite, and Pb, Zn, and Cu sulfides.

IMA Status:

Approved IMA 1960

Locality:

Balasauskandyk, Kara Tau, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for Mikhail Petrovich Rusakov (1892-1963), geologist, Kazakhstan, Russia.

Name Pronunciation:

Rusakovite + Pronunciation

Rusakovite Image

Images:

Rusakovite

Comments: Orange-brown rusakovite coatings on dark brown sandstone.
Location: Long Park, Montrose County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rusakovite Crystallography

Crystal System:

MonoclinicSpace Group: Mono ?

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

By Intensity(I/I_o): 3.21(1), 2.945(0.9), 2.441(0.8),

Physical Properties of Rusakovite

Color:

Yellow orange, Reddish yellow.

Density:

2.73 - 2.8, Average = 2.76

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

1.5-2 - Talc-Gypsum

Luster:

Earthy (Dull)

Streak:

ochraceous

Optical Properties of Rusakovite

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.3013,KC= 0.3079
Ncalc = 1.84 - 1.86

Optical Data:

Biaxial (?), a=1.833

Calculated Properties of Rusakovite

Electron Density:

Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Rusakovite =2.77 gm/cc.

Fermion Index:

Fermion Index = 0.0071426726
Boson Index = 0.9928573274

Photoelectric:

PE_Rusakovite= 11.67 barns/electron
U=PE_Rusakovite x rElectron Density= 31.85 barns/cc.

Radioactivity:

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

Rusakovite Classification

Dana Class:

42.03.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.03)where (A)5 (XO4)2 Zq · x(H2O)

(42.03.01)Dana Group

42.03.01.01 Rusakovite (Fe,Al)5(VO4,PO4)2(OH)9•3(H2O) Mono ? Mono

Strunz Class:

08.DF.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1

08.DF.15 Rusakovite (Fe,Al)5(VO4,PO4)2(OH)9•3(H2O) Mono ? Mono

Other Rusakovite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Print or Cut-and-Paste your Rusakovite Specimen Label here :

Rusakovite

(Fe+++,Al)5(VO4,PO4)2(OH)9•3(H2O)
Dana No: 42.03.01.01 Strunz No: 08.DF.15
Locality:

Notes: