Radovanite Mineral Data

General Radovanite Information

Chemical Formula:

Cu2Fe+++(AsO4)[As+++O2(OH)2]•H2O

Composition:

Molecular Weight = 575.94 gm

Iron 8.73 % Fe 12.48 % Fe₂O₃

Copper 20.96 % Cu 23.60 % Cu₂O

Arsenic 39.03 % As 34.35 % As₂O₃ / 19.95 % As₂O₅

Hydrogen 0.73 % H 6.49 % H₂O

Oxygen 30.56 % O

______ ______

100.00 % 96.87 % = TOTAL OXIDE

Empirical Formula:

Cu_1.9Fe³⁺_0.9AsAs₂H_4.15O₁₁

Environment:

Secondary mineral associated with other arsenates. New-structure type.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Roua copper deposit in the upper part of the Var Valley (Dalius gorge), Alpes-Maritimes, France. Link to MinDat.org Location Data.

Name Origin:

Named for Radovan Cerny (1957-), crystallographer at the University of Geneva, Switzerland.

Synonym:

IMA2000-001

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Radovanite Crystallography

Axial Ratios:

a:b:c =0.7292:1:0.6154

Cell Dimensions:

a = 9.585, b = 13.143, c = 8.0884, Z = 4; V = 1,018.94 Den(Calc)= 3.75

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): 3.09(1)(202), 6.179(0.9)(101), 3.241(0.4)(122),2.214(0.25)(251,223), 2.71(0.25)(240,321), 6.88(0.25)(001), 2.551(0.2)(042), 3.871(0.2)(220),

Crystal Structure:

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Sarp H , Guenee L , Archives des Sciences, Geneve , 55 (2002) p.47-55, Radovanite, Cu2Fe3+(As5+O4)(As3+O2OH)2H2O, a new mineral: its description, and crystal structure, Locality: Roua, northwestern part of Alpes-Maritimes, France

Physical Properties of Radovanite

Cleavage:

None

Color:

Pistachio green.

Density:

3.9

Diaphaneity:

Transparent

Fracture:

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

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Luster:

Vitreous (Glassy)

Streak:

green

Optical Properties of Radovanite

Gladstone-Dale:

CI meas= 0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2222,KPDmeas= 0.2137,KC= 0.2296
Ncalc = 1.86 - 1.9

Optical Data:

Biaxial (-), a=1.8, b=1.84, g=1.86, bire=0.0600

Calculated Properties of Radovanite

Electron Density:

Bulk Density (Electron Density)=3.51 gm/cc
note: Specific Gravity of Radovanite =3.75 gm/cc.

Fermion Index:

Fermion Index = 0.0019978875
Boson Index = 0.9980021125

Photoelectric:

PE_Radovanite= 39.11 barns/electron
U=PE_Radovanite x rElectron Density= 137.35 barns/cc.

Radioactivity:

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

Radovanite Classification

Dana Class:

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

(42.02)where (AB)3 (XO4) Zq · x(H2O)

(42.02.06)Dana Group

42.02.06.01 Radovanite! Cu2Fe(AsO4)[AsO2(OH)2]•H2O P nma 2/m 2/m 2/m

Strunz Class:

08.CB.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CB -With only medium-sized cations, RO4:H2O = 1:1

08.CB.40 Radovanite! Cu2Fe(AsO4)[AsO2(OH)2]•H2O P nma 2/m 2/m 2/m

Other Radovanite Information

References:

NAME( AmMin, v 88, p 1177) PHYS. PROP.(AmMin, v 88, p 1177) OPTIC PROP.(AmMin, v 88, p 1177)

See Also:

Links to other databases for Radovanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Radovanite

Cu2Fe+++(AsO4)[As+++O2(OH)2]•H2O
Dana No: 42.02.06.01 Strunz No: 08.CB.40
Locality:

Notes: