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β-Roselite

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Formula:
Ca2(Co2+,Mg)(AsO4)2 · 2H2O
Colour:
Dark rose red, dark pink
Lustre:
Vitreous
Hardness:
3½ - 4
Crystal System:
Triclinic
Name:
Named for the relation to roselite.
Dimorph of:
Hide all sections | Show all sections

Classification of β-RoseliteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
40.2.2.7

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
20.10.4

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

Physical Properties of β-RoseliteHide

Vitreous
Transparency:
Translucent
Colour:
Dark rose red, dark pink
Streak:
Red, pale
Hardness:
3½ - 4 on Mohs scale

Optical Data of β-RoseliteHide

Type:
Biaxial (-)
RI values:
nα = 1.723 nβ = 1.737 nγ = 1.756
Max Birefringence:
δ = 0.033
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v

Chemical Properties of β-RoseliteHide

Formula:
Ca2(Co2+,Mg)(AsO4)2 · 2H2O
IMA Formula:
Ca2Co(AsO4)2 · 2H2O
Common Impurities:
Mg

Crystallography of β-RoseliteHide

Crystal System:
Triclinic
Cell Parameters:
a = 5.88 Å, b = 7.67 Å, c = 5.58 Å
α = 112.32°, β = 71.35°, γ = 119.68°
Ratio:
a:b:c = 0.767 : 1 : 0.728
Unit Cell V:
199.52 ų (Calculated from Unit Cell)

Type Occurrence of β-RoseliteHide

Synonyms of β-RoseliteHide

Other Language Names for β-RoseliteHide

Relationship of β-Roselite to other SpeciesHide

Other Members of this group:
CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2OTric.
CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
GaititeCa2Zn(AsO4)2 · 2H2OTric.
MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2OTric. 1 : P1
NeomesseliteA structural variety of messelite.Tric.
NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric.
TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite6 photos of β-Roselite associated with Calcite on mindat.org.
Roselite5 photos of β-Roselite associated with Roselite on mindat.org.
Cobaltoan Calcite3 photos of β-Roselite associated with Cobaltoan Calcite on mindat.org.
Dolomite2 photos of β-Roselite associated with Dolomite on mindat.org.
Cobaltaustinite2 photos of β-Roselite associated with Cobaltaustinite on mindat.org.
Hematite1 photo of β-Roselite associated with Hematite on mindat.org.
Heterogenite1 photo of β-Roselite associated with Heterogenite on mindat.org.
Goethite1 photo of β-Roselite associated with Goethite on mindat.org.
Talmessite1 photo of β-Roselite associated with Talmessite on mindat.org.
Karibibite1 photo of β-Roselite associated with Karibibite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2OTric.
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric.
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2OTric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric.
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2OTric. 1 : P1
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon.
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon.
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon.
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2OTric.
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2OTric.
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)Tric.
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

40.2.2.1FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
40.2.2.2MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2OTric. 1 : P1
40.2.2.3CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2OTric. 1 : P1
40.2.2.4CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2OTric.
40.2.2.5TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
40.2.2.6GaititeCa2Zn(AsO4)2 · 2H2OTric.
40.2.2.8ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.10.1ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.10.2CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.10.3RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
20.10.6Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
20.10.7AerugiteNi8.5(AsO4)2As5+O8Mon. 2/m : B2/m
20.10.8XanthiositeNi3(AsO4)2Mon. 2/m : P21/b
20.10.9AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.10.10SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.
20.10.11NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for β-RoseliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1954): 39: 828-833.
Frondel, C. (1955): Neomesselite and Beta-roselite: two new members of the fairfieldite group.- American Mineralogist 40, 828-833.
Bulletin de la Société française de Minéralogie et de Cristallographie (1964): 87: 169.
Joswig, W., Paulus, E. F., Liebscher, B. (2004): Crystal structure of dicalcium (cobalt,magnesium) diarsenate dihydrate, Ca2(Co0.532Mg0.468)[AsO4]2.2H2O, hydrogen bonding in talmessite. Z. Kristallogr. - New Cryst. Struct. 219, 341-342. [NOTE: Magnesium-rich material][NOTE: Use of name talmessite is an error!].

Internet Links for β-RoseliteHide

Localities for β-RoseliteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Queensland
    • Cloncurry Shire
      • Kajabbi
S. Mills XRD data
Chile
 
  • Atacama Region
    • Chañaral province
      • El Salado
        • Diego de Almagro
          • Pampa Capitana
            • La Florida district
Ruiz Fuller C.-Peebles F.; "Yacimientos metalíferos de Chile", Fondecyt, Stgo 1988, Chile
France
 
  • Occitanie
    • Aude
      • Padern
Favreau, G., Berbain, C. & Meisser, N. (2003): Cyanophyllite et autres minéraux rares de Padern (Aude). Le Cahiers des Micromonteurs, 82(4), 17-23.
Germany
 
  • Hesse
    • Odenwald
      • Mühltal
        • Nieder-Beerbach
Belendorff, K. (1986): Erze und Sekundärmineralien von Nieder-Beerbach/Odenwald. LAPIS 11 (10), 25-28 +58.
    • Richelsdorf District
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Lower Saxony
    • Harz
      • Braunlage
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • North Rhine-Westphalia
    • Niederberg area
      • Velbert
Schnorrer-Köhler, G. (1988): Der Niederbergische Erzbezirk des Werdener Bergreviers in Nordrhein-Westfalen. Lapis 13(1): 11-35
  • Saxony
    • Erzgebirge
C. Frondel (1955): Neomesselite and Beta-roselite: two new members of the fairfieldite group.- Amer. Mineral. 40, 828-833
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aghbar
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Agoudal
http://www.spiriferminerals.com/70,IV-2010---Morocco-part-II.html
          • Aït Ahmane
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Ambed
          • Bou Azer
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
Fabre mineral specimen & photo (analyzed)
          • Ightem
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Méchoui
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Oumlil
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Tamdrost
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
Mineral and/or Locality  
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