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Rösslerite

A valid IMA mineral species - grandfathered
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Mg(HAsO4) · 7H2O
Colour:
Colorless to white, faint tints; colorless in transmitted light.
Lustre:
Vitreous, Dull
Hardness:
2 - 3
Specific Gravity:
1.943
Crystal System:
Monoclinic
Name:
Named by Johann Reinhard Blum in 1861 after Dr. Karl Rößler (6 May 1788, Wiesbaden, Germany - 23 August 1863, Hanau, Germany) (also appears as Carl Rössler or Roessler), manufacturer, mineralogist, and naturalist. He found the first specimens of the mineral. Although Rößler is the proper German spelling for the family name, the IMA approved species name is rösslerite (Burke 2008).
Type Locality:
ⓘ"Im Lochborn" Copper mine, Bieber, Biebergemünd, Main-Kinzig-Kreis, Darmstadt, Hesse, Germany
Dehydrates in air tobrassite.


Unique Identifiers
IMA Formula:
Mg(AsO3OH) · 7H2O
First published:
1861
Type description reference:
Blum, R. (1861) Rösslerit, ein neues Mineral. Jahresbericht der Wetterauischen Gesellschaft für die Gesammte Naturkunde zu Hanau, Naturhistorische Abhandlungen: 1861: 32-36.

Classification of Rösslerite

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
Dana 8th ed.:
39.1.9.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
Hey's CIM Ref.:
20.2.3

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba

Mineral Symbols
Transparency:
Transparent, Translucent
Colour:
Colorless to white, faint tints; colorless in transmitted light.
Streak:
White
Hardness:
2 - 3 onMohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
On {111}, poor.
Density:
1.943 g/cm3 (Measured)    1.948 g/cm3 (Calculated)
Comment:
Measured value is on artificial material.

Optical Data of Rösslerite
Surface Relief:
Moderate
Dispersion:
r > v
Optical Extinction:
Inclined. Previously measured optics were apparently made on the wrong species or on material that was a more hydrated material.
Pleochroism:
Non-pleochroic

Chemistry of Rösslerite

Crystallography of Rösslerite
Place of Conservation of Type Material:
No designated type material.
Associated Minerals at Type Locality:
ErythritePharmacolite
Reference:
Blum, R. (1861) Rösslerit, ein neues Mineral. Jahresbericht der Wetterauischen Gesellschaft für die Gesammte Naturkunde zu Hanau, Naturhistorische Abhandlungen: 1861: 32-36.

Synonyms of Rösslerite

Other Language Names for Rösslerite

Varieties of Rösslerite

Common AssociatesMon. 2/m :B2/m8.CE.BelmonteiteCaMn2(AsO4)2 · 7H2OOrth.mm28.CE.XBabánekiteCu3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.1 :P18.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.1 :P18.CE.10NewberyiteMg(PO3OH) · 3H2OOrth.mmm(2/m2/m2/m) :Pbca8.CE.10ManganonewberyiteMn(PO3OH)(H2O)3Orth.mmm(2/m2/m2/m) :Pbca8.CE.15Fanguangite(MoO2)(PO3OH) · 4H2OTric.1 :P18.CE.15BrassiteMg(HAsO4) · 4H2OOrth.mmm(2/m2/m2/m) :Pbca8.CE.20PhosphorrössleriteMg(PO3OH) · 7H2OMon. 2/m :P2/b8.CE.25SwitzeriteMn2+3(PO4)2 · 7H2OMon. 2/m :P21/b8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m :P2/b8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric.1 :P18.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric.1 :P18.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric.1 :P18.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric.1 :P18.CE.30Hloušekite(Ni,Co)Cu4(AsO4)2(AsO3OH)2 · 9H2OTric.1 :P18.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric.1 :P18.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m :B2/b8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m :B2/m8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.40CabreriteNiMg2(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m :B2/m8.CE.40VivianiteFe2+Fe2+2(PO4)2 · 8H2OMon. 2/m :B2/m8.CE.40ArupiteNi3(PO4)2 · 8H2OMon. 2/m :B2/m8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.40ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m :P2/m8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2OMon.8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m :B2/m8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric.1 :P18.CE.50CattiiteMg3(PO4)2 · 22H2OTric.1 :P18.CE.55KoninckiteFe3+PO4 · 3H2OTet. 422 :P412128.CE.60KaňkiteFeAsO4 · 3.5H2OMon. 2 :P28.CE.60HilarioniteFe3+2(SO4)(AsO4)(OH) · 6H2OMon. 2/m :B2/m8.CE.65SteigeriteAl(VO4) · 3H2OMon. 2/m :P21/m8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m :P2/m8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric.1 :P18.CE.75UM2009-11-PO:CaHZrCaZr[PO4]2 · 4H2OTric.8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon. 2/m :P21/b8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric.1 :P18.CE.90SlavkoviteCu13(AsO4)6(AsO3OH)4 · 23H2OTric.1 :P1

Fluorescence of Rösslerite

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    • References for RössleriteⓘMarble quarryM. Puttner: Mineralogische Rundschau von Dr. Exel 4:8-10 (1995)
    Canada
     
    Czech Republic
     
    Lapis 2002 (7/8)+1 other referenceMajzlan et al. (2021)
    France
     
    Bari (1982)Wittern+1 other referenceThis mine worked the same vein as Gabe ...+2 other references
    Germany
     
    Palache et al. (1951)Handbook for Mineralogy[var: Wapplerite]Walenta (1992)Palache et al. (1951)Weiß (1990)Möhn et al. (10/2020)Neschen (n.d.)Vollstädt et al. (1991) ...Massanek et al. (2005)Massanek et al. (2005)Massanek et al. (2005)
    Greece
     
    Rieck et al. (1999)
    Russia
     
    Pekov I.V. et al. (2010)
    Spain
     
    Rewitzer et al. (2020)
    Switzerland
     
    Cuchet (1994)+2 other references
    USA
     
    Castor et al. (2004)
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