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Rösslerite

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Jáchymov (St Joachimsthal), Jáchymov (St Joachimsthal) District, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Stephan Wolfsried

Show Rösslerite Photos (5)



Formula:
Mg(HAsO
 
4
) · 7H
 
2
O
System:MonoclinicColour:Colorless to white, ...
Hardness:2 - 3
Name:Named by Johann Reinhard Blum in 1861 after Dr. Karl Rössler of Hanau, Germany, who found the first specimen.


Dehydrates in air to brassite.

Classification of Rösslerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.15-30
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID: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
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Type Occurrence of Rösslerite

Type Locality:"Im Lochborn" Copper mine, Bieber, Gelnhausen, Spessart Mts, Hesse, Germany
Associated Minerals at type locality:
PharmacoliteErythrite

Occurrences of Rösslerite

Geological Setting:Oxidized zones of arsenical ore bodies.

Physical Properties of Rösslerite

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

Crystallography of Rösslerite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Space Group Setting:C2/c
Cell Parameters:a = 6.692Å, b = 25.744Å, c = 11.538Å
β = 95.15°
Ratio:a:b:c = 0.26 : 1 : 0.448
Unit Cell Volume: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 Diffraction:
d-spacingIntensity
12.9 (60)
6.43 (90)
4.67 (80)
4.49 (90)
4.29 (80)
4.08 (10)
3.31 (50)
2.86 (60)
Comments:ICDD 26-1447 (synthetic)

Optical Data of Rösslerite

Type:Biaxial (+)
RI values: nα = 1.488 nβ = 1.507 nγ = 1.100
2V:Measured: 28°
Birefringence:0.022
Maximum Birefringence:δ = 0.388

Chart 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 Rösslerite

Formula:
Mg(HAsO
 
4
) · 7H
 
2
O
Essential elements:As, H, Mg, O
All elements listed in formula:As, H, Mg, O

Relationship of Rösslerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CE.05Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.05Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.10Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
8.CE.15Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
8.CE.20Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
8.CE.25Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.25Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
 · 7H
 
2
O
8.CE.30Lindackerite
CuCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 8-9H
 
2
O
8.CE.30Ondrušite
CaCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.30Veselovskýite
ZnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Pradetite
CoCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Klajite
MnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9-10H
 
2
O
8.CE.35Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Annabergite
Ni
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Arupite
Ni
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Erythrite
Co
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Ferrisymplesite
Fe
3+
3
(AsO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.40Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Köttigite
Zn
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Parasymplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Vivianite
Fe
2+
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Pakhomovskyite
Co
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.45Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.50Cattiite
Mg
 
3
(PO
 
4
)
 
2
 · 22H
 
2
O
8.CE.55Koninckite
Fe
3+
 
PO
 
4
 · 3H
 
2
O
8.CE.60Kaňkite
FeAsO
 
4
 · 3.5H
 
2
O
8.CE.65Steigerite
Al(VO
 
4
) · 3H
 
2
O
8.CE.70Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
8.CE.70Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
8.CE.75Malhmoodite
FeZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Zigrasite
MgZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Unnamed (Ca-analogue of Zigrasite)
CaZr[PO
 
4
]
 
2
 · 4H
 
2
O
8.CE.80Santabarbaraite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.85Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
 · 8(H
 
2
O,OH)
8.CE.85Metavivianite
Fe
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)x · (8-x)H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.2.1Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
20.2.2Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.2.5Weilite
Ca(HAsO
 
4
)
20.2.6Johnbaumite
Ca
 
5
(AsO
 
4
)
 
3
OH
20.2.7Haidingerite
CaHAsO
 
4
 · H
 
2
O
20.2.8Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
20.2.9Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
20.2.10Vladimirite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 5H
 
2
O
20.2.11Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
20.2.13Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
 · 10H
 
2
O
20.2.14Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
 · 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
 · 4H
 
2
O
20.2.16Bergslagite
CaBeAsO
 
4
(OH)
20.2.17Adelite
CaMg(AsO
 
4
)(OH)
20.2.18Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
 · 2H
 
2
O
20.2.19Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
20.2.20Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 11H
 
2
O
20.2.22Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 5H
 
2
O

Other Names for Rösslerite

Synonyms:
Roesslerite
Other Languages:
German:Rösslerit
Russian:Ресслерит
Spanish:Rösslerita
Varieties:
Wapplerite

Other Information

Fluorescence in UV light:Not fluorescent.
Other Information:Readily soluble in dilute HCl; slightly soluble in water.
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 Rösslerite

Reference List:

- +
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 (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.
Zeit. Krist. 137:194 (1973) structure.
Acta Crystallographica (1973): B29: 286-292, structure.

Internet Links for Rösslerite

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    • Localities for Rösslerite

    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.
    Hide Locality List
    (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.
    Austria
     
    • Carinthia
      • Friesach - Hüttenberg area
        • Hüttenberg
          • Lölling
            • Stelzing
    		M. Puttner: Mineralogische Rundschau von Dr. Exel 4:8-10 (1995)
    Canada
     
    • Northwest Territories
      • Mackenzie District
        • Great Bear Lake
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov (St Joachimsthal) 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
     
    • Alsace
      • Haut-Rhin
        • Ste Marie-aux-Mines (Markirch)
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Alpirsbach
    		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; Walenta, K. (1992) "Die Mineralien des Schwarzwaldes", Weise (Munich).
        • 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
      • Richelsdorf District
        • Süss
          • Richelsdorf Smelter
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
      • Spessart Mts
        • 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
      • Harz Mts
        • St Andreasberg District
          • St Andreasberg
    		No reference listed
    • Saxony
      • Erzgebirge
        • Schlema-Hartenstein District
          • Alberoda
    		Vollstädt,H. & Weiß,St. (1991): Mineralfundstellen Sächsisches Erzgebirge, München, S.26ff.
    No reference listed
    [var: Wapplerite] Lapis 30(7/8):41-70 (2005)
          • Neustädtel
    		[var: Wapplerite] Lapis 30(7/8):41-70 (2005)
    [var: Wapplerite] Lapis 30(7/8):41-70 (2005)
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Plaka
            • Plaka Mines
    		No reference listed
    Switzerland
     
    • Wallis (Valais)
      • Turtmann Valley
        • Blüomatttälli
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 352
    USA
     
    • Nevada
      • Nye Co.
        • Manhattan District
          • Manhattan
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 20th Jun 2011 05:46:08
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