Roselite (original) (raw)
A valid IMA mineral species - grandfathered
About RoseliteHide
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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
Specific Gravity:
3.46 - 3.74
Crystal System:
Monoclinic
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.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3450:6
e9b58dfb-134c-4e39-90d9-b971bec04aaa
IMA Classification of RoseliteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Classification of RoseliteHide
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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
40.2.3.1
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
Mineral SymbolsHide
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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 RoseliteHide
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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
Cleavage:
Perfect
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 RoseliteHide
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RI values:
_n_α = 1.694 - 1.725 _n_β = 1.704 - 1.730 _n_γ = 1.719 - 1.735
2V:
Measured: 60° to 70°, Calculated: 68°
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
X = b, X ∧ c = ~0° to 4°, Y = b, Y ∧ c = 12° to 20°, Z ∧ c = -70° to 91°.
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
Chemistry of RoseliteHide
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Mindat Formula:
Ca2Co(AsO4)2 · 2H2O
Co may be replaced by minor Mg.
Crystallography of RoseliteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.801 Å, b = 12.898 Å, c = 5.617 Å
β = 107.42°
Ratio:
a:b:c = 0.45 : 1 : 0.435
Unit Cell V:
401.00 ų (Calculated from Unit Cell)
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 StructureHide
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| 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 DiffractionHide
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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 EnvironmentHide
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Type Occurrence of RoseliteHide
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Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Synonyms of RoseliteHide
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Other Language Names for RoseliteHide
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Relationship of Roselite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of RoseliteHide
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Other InformationHide
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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 RoseliteHide
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References for RoseliteHide
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Reference List:
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
Localities for RoseliteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.