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Roselite

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Formula:
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
System:MonoclinicColour:Rose-red, pink; rose ...
Hardness:
Member of:Roselite Group
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:β-Roselite
Isostructural with:Brandtite, Wendwilsonite


Roselite Group. Roselite-Wendwilsonite Series.
The monoclinc dimorph of β-Roselite. The cobalt analogue of Wendwilsonite.

Classification of Roselite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.17-100
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:40.2.3.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.:20.10.3

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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Type Occurrence of Roselite

Type Locality:Rappold Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1824
Geological Setting of type material:Quartzose vein material
Associated Minerals at type locality:
QuartzChalcedony

Physical Properties of Roselite

Lustre:Vitreous, Sub-Vitreous, Resinous
Diaphaneity (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 (Mohs):
Tenacity:Brittle
Cleavage:Perfect
On {010}, perfect (easy).
Density (measured):3.46 - 3.74 g/cm3
Density (calculated):3.65 g/cm3
Comment:Density increases with Co content

Crystallography of Roselite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b
Space Group Setting:P21/c
Cell Parameters:a = 5.801Å, b = 12.898Å, c = 5.617Å
β = 107.42°
Ratio:a:b:c = 0.45 : 1 : 0.435
Unit Cell Volume: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.
X-Ray Powder Diffraction:
d-spacingIntensity
6.444 (20)
5.089 (20)
3.395 (35)
3.354 (60)
3.222 (75)
2.993 (100)
2.763 (50)

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
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v weak
Optical Extinction:X = b, X^c = ~0° - 4°, Y = b, Y^c = 12°-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

Chemical Properties of Roselite

Formula:
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
Simplified for copy/paste:Ca2(Co2+,Mg)(AsO4)2·2H2O
Essential elements:As, Ca, Co, H, O
All elements listed in formula:As, Ca, Co, H, Mg, O

Relationship of Roselite to other Species

Series:Forms a series with Wendwilsonite (see here)
Member of:Roselite Group
Other Members of Group:

- +
Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
· 2H
 
2
O
Rruffite
Ca
 
2
Cu(AsO
 
4
)
 
2
· 2H
 
2
O
Unnamed (Fe2+-analogue of Brandtite)
Ca
 
2
Fe
2+
 
(AsO
 
4
)
 
2
· 2H
 
2
O
Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
Zincroselite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CG.05Cassidyite
Ca
 
2
(Ni
2+
 
,Mg)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Collinsite
Ca
 
2
(Mg,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Gaitite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Parabrandtite
Ca
 
2
Mn
2+
 
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.05Hillite
Ca
 
2
(Zn,Mg)(PO
 
4
)
 
2
· 2 H
 
2
O
8.CG.10Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Zincroselite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.10Rruffite
Ca
 
2
Cu(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.15Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
· 2(OH,F)
8.CG.15Thometzekite
Pb(Cu,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
(VO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Cobalttsumcorite
Pb(Co,Fe
3+
 
,Ni)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Nickellotharmeyerite
Ca(Ni,Fe
3+
 
,Co)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.15Manganlotharmeyerite
Ca(Mn
3+
 
,Zn)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.15Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(OH,H
 
2
O)
8.CG.20Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
(AsO
 
4
,SO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Helmutwinklerite
Pb(Zn,Cu)
 
2
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.20Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Rappoldite
Pb(Co,Ni,Zn)
 
2
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CG.20Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
(PO
 
4
,AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.20Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
8.CG.25Pottsite
HPbBi(VO
 
4
)
 
2
· 2H
 
2
O
8.CG.35Nickeltalmessite
Ca
 
2
Ni(AsO
 
4
)
 
2
· 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.10.1Erythrite
Co
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.2Cobaltaustinite
CaCo(AsO
 
4
)(OH)
20.10.4β-Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.5Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.6Cobaltkoritnigite
(Co,Zn)(HAsO
 
4
) · H
 
2
O
20.10.7Aerugite
Ni
 
8.5
(AsO
 
4
)
 
2
As
5+
 
O
 
8
20.10.8Xanthiosite
Ni
 
3
(AsO
 
4
)
 
2
20.10.9Annabergite
Ni
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.10Smolyaninovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
· 11H
 
2
O
20.10.11Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)

Other Names for Roselite

Synonyms:
Roselith
Other Languages:
German:Roselit
Russian:Розелит
Spanish:Roselita

Other Information

Fluorescence in UV light:Not fluorescent in UV
Other Information:Readily soluble in acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Roselite

Reference List:

- +
Lévy (1824) Annals of Philosophy, London: 8: 439.

Lévy (1825) Edinburgh Journal of Science: 2: 177.

Schrauf (1874) Mineralogische und petrographische Mitteilungen, Vienna: 137.

Winkler (1874) Zeitschrift praktische Chemie: 10: 190.

Weisbach (1877) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 407.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 810.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 128.

Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 7: 127.

Peacock (1936) American Mineralogist: 21: 589.

Wolfe (1940) American Mineralogist: 25: 750.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 723-725.

Canadian Mineralogist (1977): 36-42.

Dunn, P. J., Sturman, B. D., Nelen, J. A. (1987): Wendwilsonite, the magnesium analogue of roselite, from Morocco, New Jersey, and Mexico, and new data on roselite. Am. Mineral., 72, 217-221.

Weiss, S., Lengauer, C.L., Parodi, G.C. (2002): Roselith, Wendwilsonit und kobalthaltiger Talmessit aus Bou Azzer, Marokko. Lapis 27 (1), 37-41; 58. (in German)

Internet Links for Roselite

Search Engines:
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  • External Links:
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  • Look for Roselite on Athena Mineralogy
  • Look for Roselite on Wikipedia
  • Look for Roselite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Roselite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Specimens:The following Roselite specimens are currently listed for sale on minfind.com.

    Localities for Roselite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Queensland
      • Mount Isa - Cloncurry area
        • Cloncurry district
          • Kajabbi railroad station
    S. Mills XRD data
    • South Australia
      • Olary Province
        • Kalabity homestead area
    Jack Leach collection & Museum of Victoria
    Canada
     
    • British Columbia
      • Slocan Mining Division
        • Sandon
    Mauthner, M.H.F. et al. (1996) Minerals of the Silvana Mine Sandon British Columbia. Mineralogical Record, 27(6):433-438.
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
    maurizio dini collection - quantitative analysis
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schapbach
          • Wildschapbach valley
    Wittern: "Mineralfundorte in Deutschland", 2001
        • Schenkenzell
          • Wittichen
            • Heubach Valley
    No reference listed
    • Hesse
      • Odenwald
        • Abtsteinach
          • Mackenheim
    M Kampf collection
      • Richelsdorf District
        • Bauhaus
    Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Süss
          • Richelsdorf Smelter
    S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
    • Rhineland-Palatinate
      • Siegerland
        • Betzdorf
          • Schutzbach
    Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Saxony
      • Erzgebirge
        • Schneeberg District
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 753.
    Lapis 30(7/8):41-70 (2005)
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 725.
    Lapis 30(7/8):22-23 (2005)
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 725; Wittern: "Mineralfundorte in Deutschland", 2001
    Lapis 30(7/8):22-23 (2005)
    Italy
     
    • Piedmont
      • Torino Province
        • Lanzo Valleys
          • Viù Valley
            • Usseglio
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Aghbar
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    JP Barral collection
            • Aït Ahmane
    Georges FAVREAU collection
            • Bou Azer
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
            • Oumlil
    M. Kampf collection
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