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Rößlerite

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About RößleriteHide

01517800015012901227834.jpg
Karl Rößler
Formula:
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 spelled Carl Rössler or Roessler), manufacturer, mineralogist, and naturalist. He found the first specimens of the mineral.
Dehydrates in air to brassite.


Classification of RößleriteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1861
8.CE.20

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

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
20.2.3

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

Physical Properties of RößleriteHide

Vitreous, Dull
Transparency:
Transparent, Translucent
Colour:
Colorless to white, faint tints; colorless in transmitted light.
Streak:
White
Hardness:
2 - 3 on Mohs 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 RößleriteHide

Type:
Biaxial (+)
RI values:
nα = 1.488 nβ = 1.507 nγ = 1.100
2V:
Measured: 28°
Birefringence:
0.022
Max Birefringence:
δ = 0.388
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
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

Chemical Properties of RößleriteHide

Formula:
Mg(HAsO4) · 7H2O
IMA Formula:
Mg(AsO3OH) · 7H2O

Crystallography of RößleriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 6.692 Å, b = 25.744 Å, c = 11.538 Å
β = 95.15°
Ratio:
a:b:c = 0.26 : 1 : 0.448
Unit Cell V:
1,979.73 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Well-formed crystals rare, small, short prismatic [001]. Fine-grained crusts; hair-like at times. Artificial crystals are tabular {010}.
Comment:
Zeit. Krist. 137:194 (1973) structure

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.9 Å(60)
6.43 Å(90)
4.67 Å(80)
4.49 Å(90)
4.29 Å(80)
4.08 Å(10)
3.31 Å(50)
2.86 Å(60)
Comments:
ICDD 26-1447 (synthetic)

Type Occurrence of RößleriteHide

Synonyms of RößleriteHide

Other Language Names for RößleriteHide

Varieties of RößleriteHide

WappleriteA calcium-rich variety of Rösslerite.
Originally reported from Jáchymov (St Joachimsthal), Ostrov, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic.

Common AssociatesHide

Associated Minerals Based on Photo Data:
11 photos of Rößlerite associated with BrassiteMg(HAsO4) · 4H2O
1 photo of Rößlerite associated with ArsenicAs

Related Minerals - Nickel-Strunz GroupingHide

8.CE.XBabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.10NewberyiteMg(HPO4) · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.15BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b
8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
8.CE.25SwitzeriteMn2+3(PO4)2 · 7H2OMon.
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
8.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ArupiteNi3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40VivianiteFe2+3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
8.CE.50CattiiteMg3(PO4)2 · 22H2OTric. 1 : P1
8.CE.55KoninckiteFe3+PO4 · 3H2OTet.
8.CE.60KaňkiteFeAsO4 · 3.5H2OMon. 2 : P2
8.CE.65SteigeriteAl(VO4) · 3H2OMon. 2/m : P21/m
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon.
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric. 1 : P1
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2OTric.
8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1

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

39.1.9.2PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.2.1BearsiteBe2(AsO4)(OH) · 4H2OMon.
20.2.2BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.2.4HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.2.5WeiliteCa(HAsO4)Tric. 1 : P1
20.2.6JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
20.2.7HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
20.2.8PharmacoliteCa(HAsO4) · 2H2OMon. m
20.2.9SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
20.2.10VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
20.2.12FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
20.2.13RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
20.2.14PhaunouxiteCa3(AsO4)2 · 11H2OTric.
20.2.15McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
20.2.16BergslagiteCaBeAsO4(OH)Mon. 2/m : P21/b
20.2.17AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.2.18TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
20.2.19IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
20.2.20CamgasiteCaMg(AsO4)(OH) · 5H2OMon. 2/m : P21/m
20.2.21PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
20.2.22BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m

Fluorescence of RößleriteHide

Not fluorescent.

Other InformationHide

Notes:
Readily soluble in dilute HCl; slightly soluble in water. Dehydrates in air to brassite.
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 RößleriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Blum (1861) Wetterauische Gesellschaft für die Gesammte Naturkunde zu Hanau. Jahresbericht. Naturhistorische Abhandlungen: 32.
Tschermak (1867) Konigliche Akademie der Wissenschaften, Vienna, Ber.: 56: 824
Haushofer (1882) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 7: 259 (artif. crystals).
de Schulten, A. (1903) Bulletin de la Société française de Minéralogie: 26: 95, 99.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 156.
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.: 712-713.
Keller, P. (1971) Die Kristallchemie der Phosphat- und Arsenatminerale unter besonderer Berücksichtigung der Kationen-Koordinationspolyeder und des Kristallwassers. Neues Jahrbuch für Mineralogie - Monatshefte: 491–510.
Street, R.L.T., Whitaker, A. (1973) The isostructurality of rösslerite and phosphorösslerite. Zeitschrift für Kristallographie: 137: 246–255.
Ferraris, G., Franchini-Angela, M. (1973) Hydrogen bonding in the crystalline state. Crystal structure of MgHAsO4•7H2O, roesslerite. Acta Crystallographica: 29: 286–292.

Internet Links for RößleriteHide

Localities for RößleriteHide

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.
Austria
 
  • Carinthia
    • Sankt Veit an der Glan District
      • Hüttenberg
        • Hüttenberg
          • Lölling
            • Stelzing
M. Puttner: Mineralogische Rundschau von Dr. Exel 4:8-10 (1995)
Canada
 
  • Northwest Territories
    • Great Bear Lake
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary 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: 712; Lapis 2002(7/8), 63-65.
France
 
  • Grand Est
    • Haut-Rhin
      • Colmar-Ribeauvillé
        • Ste Marie-aux-Mines
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
            • Sankt Jakob vein
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
Germany
 
  • Baden-Württemberg
    • Alpirsbach
[var: Wapplerite] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • Schenkenzell
      • Wittichen
        • Böckelsbach valley
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992.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: 712;
        • Heubach Valley
Handbook for Mineralogy, v. 4
  • Hesse
    • Hersfeld-Rotenburg
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
    • Main-Kinzig
      • Gelnhausen
        • Bieber
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: 712.
  • Lower Saxony
    • Goslar
      • Braunlage
        • St Andreasberg
No reference listed
  • Saxony
    • Erzgebirgskreis
      • Aue-Bad Schlema
        • Alberoda
Vollstädt,H. & Weiß,St. (1991): Mineralfundstellen Sächsisches Erzgebirge, München, S.26ff.
No reference listed
Lapis 30(7/8):41-70 (2005)
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion District Mines
          • Plaka
            • Plaka Mines
Rieck, B. & Rieck, P. (1999): Silber, Arsen und Antimon: Vererzungen im Revier Plaka (Teil 2). Lapis, 24 (7-8), 59-60.
Russia
 
  • Adygea
Pekov I.V. et al. (2010) Mineralogy of Belorechenskoe deposit (Northern Caucasus, Russia). Mineralogical Almanakh, 15(2).
Switzerland
 
  • Valais
    • Turtmann Valley
      • Blüomatttälli
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 352; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
USA
 
  • Nevada
    • Nye Co.
      • Toquima Range
        • Manhattan Mining District
          • Manhattan
NBMG Spec. Pub. 31 Minerals of Nevada
 
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