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 Group. 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
GUID
(UUID V4):
(UUID V4):
e9b58dfb-134c-4e39-90d9-b971bec04aaa
IMA Classification of Roselite
Approved, 'Grandfathered' (first described prior to 1959)
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 |
|---|---|---|
| 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 = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
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.
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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2x2x2 | 3x3x3 | 4x4x4
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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 this 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 |
| Unnamed (Fe2+-analogue of Brandtite) | Ca2Fe2+(AsO4)2 · 2H2O | |
| 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
Associated Minerals Based on Photo Data:
| 79 photos of Roselite associated with Calcite | CaCO3 |
| 63 photos of Roselite associated with Dolomite | CaMg(CO3)2 |
| 43 photos of Roselite associated with Cobaltaustinite | CaCo(AsO4)(OH) |
| 37 photos of Roselite associated with Heterogenite | Co3+O(OH) |
| 21 photos of Roselite associated with Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 20 photos of Roselite associated with Quartz | SiO2 |
| 16 photos of Roselite associated with Cobalt-bearing Calcite | (Ca,Co)CO3 |
| 15 photos of Roselite associated with Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 13 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. | Ca-Huréaulite | CaMn5(PO4)4 · 4H2O |
| 8.CG. | Fluckite | CaMn2+(AsO3OH)2 · 2H2O |
| 8.CG. | Dondoellite | Ca2Fe(PO4)2 · 2H2O |
| 8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
| 8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
| 8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
| 8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
| 8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.05 | Talmessite | Ca2Mg(AsO4)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 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
| 8.CG.10 | Unnamed (Fe2+-analogue of Brandtite) | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
| 8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Mawbyite | PbFe3+2(AsO4)2(OH)2 |
| 8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH,F)2 |
| 8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
| 8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
| 8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
| 8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
| 8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
| 8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
| 8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
| 8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
| 8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
| 8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
| 8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
| 8.CG.20 | Helmutwinklerite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
| 8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
| 8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
| 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.
Search Engines:
External Links:
References for Roselite
Reference List:
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin Vol. 679. US Geological Survey doi:10.3133/b679 p.128
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
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
Localities for Roselite
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 (1996) |
Chile | |
| maurizio dini collection - quantitative ... |
Germany | |
| |
| Wittern (2001) |
| M Kampf collection |
| Weiß (1990) |
| Weiß (1990) | |
| Weiß (1990) |
| Palache et al. (1951) |
| Lapis 30 (7/8) | |
| 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 | |
| Georges Favreau collection |
| Favreau et al. (2006) | |
| M. Kampf collection |
| Richard D. Green |
Spain | |
| Calvo Rebollar et al. (2022) |
Quick NavTopAbout RoseliteUnique IdentifiersIMA 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