Radovanite
A valid IMA mineral species
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About Radovanite
Prof. Radovan Cerny
Formula:
Cu2Fe3+(AsO4)(HAs3+O3)2 · H2O
Colour:
Pistachio green
Lustre:
Adamantine, Vitreous
Specific Gravity:
3.9
Crystal System:
Orthorhombic
Name:
Named for Radovan Černý (born 1957), eminent crystallographer, University of Geneva, Switzerland.
(Not to be confused with rakovanite.)
The structural network consists of paired edge-sharing CuO5 square pyramids and FeO6 octahedra; these are linked together by AsO4 tetrahedra and AsO3 triangular groups. The water molecule is within a cavity, held by hydrogen bonds involving its two hydrogen atoms and OH group shared between the Cu polyhedra and arsenate triangles.
The structural network consists of paired edge-sharing CuO5 square pyramids and FeO6 octahedra; these are linked together by AsO4 tetrahedra and AsO3 triangular groups. The water molecule is within a cavity, held by hydrogen bonds involving its two hydrogen atoms and OH group shared between the Cu polyhedra and arsenate triangles.
Unique Identifiers
Mindat ID:
11132
Long-form identifier:
mindat:1:1:11132:0
Similar Names
| Rakovanite | A valid IMA mineral species | (NH4)3Na3(V10O28) · 12H2O |
IMA Classification of Radovanite
Approved
IMA Formula:
Cu2+2Fe3+(As5+O4)(As3+O2OH)2·H2O
Approval year:
2000
First published:
2002
Classification of Radovanite
8.CB.40
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rdv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Radovanite
Adamantine, Vitreous
Transparency:
Transparent
Colour:
Pistachio green
Streak:
Green
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
3.9 g/cm3 (Measured) 3.79 g/cm3 (Calculated)
Optical Data of Radovanite
Type:
Biaxial (-)
RI values:
nα = 1.8 nβ = 1.84 nγ = 1.86
2V:
Measured: 65° , Calculated: 69°
Max. Birefringence:
δ = 0.060
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Pleochroism:
Weak
Comments:
X = light green to colourless, Y = yellow green, Z = pistachio green
Chemistry of Radovanite
Mindat Formula:
Cu2Fe3+(AsO4)(HAs3+O3)2 · H2O
Element Weights:
Crystallography of Radovanite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Cell Parameters:
a = 9.585 Å, b = 13.143 Å, c = 8.0884 Å
Ratio:
a:b:c = 0.729 : 1 : 0.615
Unit Cell V:
1018.9 ų
Z:
4
Morphology:
Equidimensional to slightly elongate (along a or b) crystals, displaying forms {101}, {011}, {001}, {010}, {hk0}, and {hkl}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012037 | Radovanite | Sarp H, Guenee L (2002) Radovanite, Cu2Fe3+(As5+O4)(As3+O2OH)2H2O, a new mineral: its description and crystal structure Archives des Sciences, Geneve 55 47-55 | 2002 | Roua, northwestern part of Alpes-Maritimes, France | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.88 Å | (25) |
| 6.179 Å | (90) |
| 3.241 Å | (40) |
| 3.090 Å | (100) |
| 2.710 Å | (25) |
| 2.214 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Radovanite
General Appearance of Type Material:
Crystals up to 0.15 x 0.08 x 0.02 mm in size, aggregates up to 2 mm in diameter.
Place of Conservation of Type Material:
Department of Mineralogy, Natural History Museum of Geneva, Switzerland.
Geological Setting of Type Material:
old Cu mines
Associated Minerals at Type Locality:
Synonyms of Radovanite
Other Language Names for Radovanite
Dutch:Radovaniet
German:Radovanit
Simplified Chinese:拉多水砷铁铜石
Spanish:Radovanita
Traditional Chinese:拉多水砷鐵銅石
Related Minerals - Strunz-mindat Grouping
| 8.CB. | Krupičkaite | Cu6[AsO3(OH)]6 · 8H2O |
| 8.CB.X | Honzaite | Ni2(AsO3OH)2 · 5H2O |
| 8.CB.X | Redondite | AlPO4 · 2H2O |
| 8.CB.05 | Ermeloite | Al(PO4) · H2O |
| 8.CB.05 | Serrabrancaite | MnPO4 · H2O |
| 8.CB.10 | Nyholmite | Cd3Zn2(AsO3OH)2(AsO4)2 · 4H2O |
| 8.CB.10 | Villyaellenite | (Mn,Ca)Mn2Ca2(AsO3OH)2(AsO4)2 · 4H2O |
| 8.CB.10 | Giftgrubeite | CaMn2Ca2(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CB.10 | Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
| 8.CB.10 | Miguelromeroite | Mn2+5(AsO3OH)2(AsO4)2(H2O)4 |
| 8.CB.10 | 'UM1997-09-AsO:CaHMgZn' | (Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2O |
| 8.CB.15 | Krautite | Mn(HAsO4) · H2O |
| 8.CB.20 | Cobaltkoritnigite | Co(AsO3OH) · H2O |
| 8.CB.20 | Magnesiokoritnigite | Mg(AsO3OH) · H2O |
| 8.CB.20 | Koritnigite | Zn(AsO3OH) · H2O |
| 8.CB.25 | Yvonite | Cu(HAsO4) · 2H2O |
| 8.CB.30 | Geminite | Cu2+(AsO3OH) · H2O |
| 8.CB.35 | Schubnelite | Fe3+VO4 · H2O |
| 8.CB.45 | Kazakhstanite | Fe3+5V4+3V5+12O39(OH)9 · 9H2O |
| 8.CB.50 | Kolovratite | NixZny(VO4)0.67(x+y) · nH2O |
| 8.CB.60 | Burgessite | Co2(H2O)4[AsO3(OH)]2(H2O) |
| 8.CB.65 | Cardite | Zn5.5(AsO4)2(AsO3OH)(OH)3 · 3H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Radovanite
mindat.org URL:
https://www.mindat.org/min-11132.html
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Please feel free to link to this page.
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References for Radovanite
Localities for Radovanite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Riviéra Scientifique 84 (2000) +1 other reference |
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Roua Mines, Daluis, Nice Arrondissement, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France