Roselite
A valid IMA mineral species - grandfathered
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About Roselite
Gustav Rose
Formula:
Ca2Co(AsO4)2 · 2H2O
Co may be replaced by minor Mg.
Colour:
Rose-red, pink; rose coloured in transmitted light
Lustre:
Vitreous, Sub-Vitreous, Resinous
Hardness:
3½
Specific Gravity:
3.46 - 3.74
Crystal System:
Monoclinic
Member of:
Name:
Named in 1824 by Armand Levy in honor of German mineralogist Gustav Rose [March 18, 1798 Berlin, Germany – July 15, 1873 Berlin, Germany], Professor of Mineralogy, University of Berlin.
Dimorph of:
Isostructural with:
Roselite-Wendwilsonite Series.
The monoclinc dimorph of anorthoroselite (triclinic). The cobalt analogue of wendwilsonite.
The monoclinc dimorph of anorthoroselite (triclinic). The cobalt analogue of wendwilsonite.
Unique Identifiers
Mindat ID:
3450
Long-form identifier:
mindat:1:1:3450:6
Similar Names
| Noselite | A synonym of Nosean | |
| Rizalite | A synonym of 'Philippinite' | |
| Roseite | (Os,Ir)S | |
| Roselite-β | A synonym of Anorthoroselite | |
| Rosenite | A synonym of Plagionite | |
| Rosolite | A variety of Grossular | Ca3Al2(SiO4)3 |
| Russellite | A valid IMA mineral species - grandfathered | Bi2WO6 |
IMA Classification of Roselite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca2Co2+(As5+O4)2·2H2O
Classification of Roselite
8.CG.10
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
40.2.3.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
20.10.3
20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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 |
|---|---|---|
| Rsl | 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 Roselite
Vitreous, Sub-Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Rose-red, pink; rose coloured in transmitted light
Comment:
Darker coloured crystals frequently exhibit marked colour zoning due to variations in composition.
Streak:
White to pale pink
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {010}, perfect (easy).
On {010}, perfect (easy).
Density:
3.46 - 3.74 g/cm3 (Measured) 3.65 g/cm3 (Calculated)
Comment:
Density increases with Co content
Optical Data of Roselite
Type:
Biaxial (-)
RI values:
nα = 1.694 - 1.725 nβ = 1.704 - 1.730 nγ = 1.719 - 1.735
2V:
Measured: 60° to 70°, Calculated: 68°
Birefringence:
0.018
Max. Birefringence:
δ = 0.010 - 0.025
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.
Dispersion:
r > v weak
Optical Extinction:
X = b, X ∧ c = ~0° to 4°, Y = b, Y ∧ c = 12° to 20°, Z ∧ c = -70° to 91°.
Pleochroism:
Visible
Comments:
Light rose coloured material:
X = ^c~ 0° to 4° = Light rose pink to dark rose-pink, Y = paler rose pink than in X, Z = palest rose pink
Y = b = Lighter rose
Z = ^c~ 90° to +91° = lightest rose
Dark rose coloured material:
X = b = Dark rose
Y = ^c
X = ^c~ 0° to 4° = Light rose pink to dark rose-pink, Y = paler rose pink than in X, Z = palest rose pink
Y = b = Lighter rose
Z = ^c~ 90° to +91° = lightest rose
Dark rose coloured material:
X = b = Dark rose
Y = ^c
Chemistry of Roselite
Mindat Formula:
Ca2Co(AsO4)2 · 2H2O
Co may be replaced by minor Mg.
Co may be replaced by minor Mg.
Element Weights:
Crystallography of Roselite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.801 Å, b = 12.898 Å, c = 5.617 Å
β = 107.42°
β = 107.42°
Ratio:
a:b:c = 0.45 : 1 : 0.435
Unit Cell V:
401.00 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals short prismatic [001]; thick tabular {001} uncommon. Terminations commonly simple and exhibiting monoclinic or orthorhombic aspect with large {122} and {122}. Druses of interlocking crystals and spherical aggregates.
Twinning:
On {100}, very common, with {100} as the composition plane; also as fourlings.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
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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) |
|---|---|---|---|---|---|---|---|
| 0005135 | Roselite | Hawthorne F C, Ferguson R B (1977) The crystal structure of roselite The Canadian Mineralogist 15 36-42 |  | 1977 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.444 Å | (20) |
| 5.089 Å | (20) |
| 3.395 Å | (35) |
| 3.354 Å | (60) |
| 3.222 Å | (75) |
| 2.993 Å | (100) |
| 2.763 Å | (50) |
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 Roselite
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Quartzose vein material
Associated Minerals at Type Locality:
Synonyms of Roselite
Other Language Names for Roselite
Relationship of Roselite to other Species
Member of:
Other Members of Brandtite Group:
| Brandtite | Ca2Mn2+(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Dobšináite | Ca2Ca(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Kröhnkite | Na2Cu(SO4)2 · 2H2O | Mon. 2/m : P21/b |
| Rruffite | Ca2Cu(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Zincroselite | Ca2Zn(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 83 photos of Roselite associated with Calcite | CaCO3 |
| 76 photos of Roselite associated with Dolomite | CaMg(CO3)2 |
| 56 photos of Roselite associated with Cobaltaustinite | CaCo(AsO4)(OH) |
| 37 photos of Roselite associated with Heterogenite | Co3+O(OH) |
| 27 photos of Roselite associated with Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 26 photos of Roselite associated with 'Cobalt-bearing Calcite' | (Ca,Co)CO3 |
| 25 photos of Roselite associated with Quartz | SiO2 |
| 22 photos of Roselite associated with Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 15 photos of Roselite associated with Erythrite | Co3(AsO4)2 · 8H2O |
| 9 photos of Roselite associated with Talmessite | Ca2Mg(AsO4)2 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CG. | Fluckite | CaMn2+(AsO3OH)2 · 2H2O |
| 8.CG. | Dondoellite | Ca2Fe(PO4)2 · 2H2O |
| 8.CG. | 'Ca-Huréaulite' | CaMn5(PO4)4 · 4H2O |
| 8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
| 8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.05 | Talmessite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
| 8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
| 8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
| 8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 8.CG.05 | Hillite | Ca2Zn(PO4)2 · 2H2O |
| 8.CG.05 | 'Unnamed (Fe2+-analogue of Parabrandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
| 8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.10 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.10 | 'Unnamed (Fe2+-analogue of Brandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.15 | Mawbyite | PbFe3+2(AsO4)2(OH)2 |
| 8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
| 8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
| 8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
| 8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
| 8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
| 8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
| 8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
| 8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
| 8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
| 8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH)2 |
| 8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
| 8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
| 8.CG.20 | Helmutwinklerite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
| 8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
| 8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
| 8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.25 | Pottsite | (Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0) |
| 8.CG.25 | Armellinoite-(Ce) | Ca4Ce4+(AsO4)4 · H2O |
| 8.CG.35 | Nickeltalmessite | Ca2Ni(AsO4)2 · 2H2O |
| 8.CG.55 | Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
Fluorescence of Roselite
Not fluorescent in UV
Other Information
Notes:
Readily soluble in acids.
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 Roselite
mindat.org URL:
https://www.mindat.org/min-3450.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Roselite
Reference List:
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin 679. US Geological Survey doi:10.3133/b679 p.128
Peacock, M. A. (1936) On roselite and the rule of highest pseudo-symmetry. American Mineralogist, 21 (9) 589-603
Wolfe, C. W. (1940) Classification of minerals of the type A3(XO4)2·nH2O. American Mineralogist, 25 (11) 738-753
Hawthorne, F. C., Ferguson, R. B. (1977) The crystal structure of roselite. The Canadian Mineralogist, 15 (1) 36-42
Dunn, Pete J., Sturman, B. Darko, Nelen, Joseph A. (1987) Wendwilsonite, the Mg analogue of roselite, from Morocco, New Jersey, and Mexico, and new data on roselite. American Mineralogist, 72 (1-2) 217-221
Fleck, Michel, Kolitsch, U., Hertweck, B. (2002) Natural and synthetic compounds with kröhnkite-type chains: review and classification. Zeitschrift für Kristallographie, 217 (9). 435-443 doi:10.1524/zkri.217.9.435.22883
Fleck, Michel, Kolitsch, U. (2003) Natural and synthetic compounds with kröhnkite-type chains. An update. Zeitschrift für Kristallographie, 218 (8). 553-567 doi:10.1524/zkri.218.8.553.20689
Kolitsch, Uwe, Fleck, Michel (2005) Second update on compounds with kröhnkite-type chains. Zeitschrift für Kristallographie, 220 (1). 31-41 doi:10.1524/zkri.220.1.31.58894
Kolitsch, Uwe, Fleck, Michel (2006) Third update on compounds with krohnkite-type chains: the crystal structure of wendwilsonite [Ca2Mg(AsO4)22H2O] and the new triclinic structure types of synthetic AgSc(CrO4)22H2O and M2Cu(Cr2O7)22H2O (M = Rb, Cs) European Journal of Mineralogy, 18 (4) 471-482 doi:10.1127/0935-1221/2006/0018-0471
Frost, Ray L. (2009) Raman and infrared spectroscopy of arsenates of the roselite and fairfieldite mineral subgroups. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 71 (5) 1788-1794 doi:10.1016/j.saa.2008.06.039
Weil, Matthias, Kolitsch, Uwe (2021) (NH4)Mg(HSO4)(SO4)(H2O)2 and NaSc(CrO4)2(H2O)2, two crystal structures comprising kröhnkite-type chains, and the temperature-induced phase transition (NH4)Mg(HSO4)(SO4)(H2O)2 <-> (NH4)MgH(SO4)2(H2O)2. Acta Crystallographica Section C Structural Chemistry, 77 (3). 144-151 doi:10.1107/s2053229621001650[with updated overview on compounds with kröhnkite-type chains]
Localities for Roselite
Showing 29 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.
Australia | |
| S. Mills XRD data |
| Jack Leach collection & Museum of ... |
Azerbaijan | |
| Pekov et al. (2001) |
Canada | |
| Mauthner et al. (1996) |
Chile | |
| maurizio dini collection - quantitative ... |
Germany | |
| |
| Wittern (2001) |
| M Kampf collection |
| Weiß (1990) |
| Weiß (1990) | |
| Weiß (1990) |
| Palache et al. (1951) |
| Massanek et al. (2005) | |
| Palache et al. (1951) | |
| Lapis 30 (7/8) | |
| Palache et al. (1951) +1 other reference |
| Lapis 30 (7/8) | |
Iran | |
| Bariand et al. (1993) |
Italy | |
| Piccoli et al. (2007) |
Morocco | |
| Fabre Minerals |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| JP Barral collection +1 other reference | |
| Favreau (n.d.) |
| Favreau (n.d.) | |
| Favreau et al. (2006) | |
| M Kampf collection |
| Richard D. Green |
Spain | |
| Calvo Rebollar et al. (2022) |
Quick NavTopAbout RoseliteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Bou Azzer Mine, Ouisselsate Caïdat, Amerzgane Cercle, Ouarzazate Province, Drâa-Tafilalet Region, Morocco