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Rooseveltite

Big Photo

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© Richard Bayerl

Formula:
BiAsO
 
4
System:MonoclinicColour:White to pale gray, pale ...
Hardness:4 - 4½
Name:
For US Franklin Delano Roosevelt (1882-1945), 32nd. President of the United States of America.
Dimorph of:Tetrarooseveltite
Isostructural with:Monazite Group


Monazite Group

Classification of Rooseveltite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/A.18-10
Nickel-Strunz 10th (pending) edition ID:8.AD.50

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 8th edition ID:38.4.4.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
Hey's CIM Ref.:20.6.1

20 : Arsenates (also arsenates with phosphate, but without other anions)
6 : Arsenates of Bi
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Type Occurrence of Rooseveltite

Type Locality:Santiaguillo, Macha area, Chayanta Province, Potosí Department, Bolivia
Place of Conservation of Type Material:Smithsonian, Harvard University
Year of Discovery:1946
Geological Setting of type material:Veinlets in rhyolitic and dacitic lava flows.
Associated Minerals at type locality:
Wood Tin

Physical Properties of Rooseveltite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:White to pale gray, pale green, yellow
Hardness (Mohs):4 - 4½
Hardness (Vickers):VHN25=513 kg/mm2
Tenacity:Brittle
Fracture:Irregular/Uneven, Conchoidal
Density (measured):6.86 - 7.01 g/cm3
Density (calculated):7.21 g/cm3

Crystallography of Rooseveltite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 6.879(1) Å, b = 7.159(1) Å, c = 6.732(1) Å
β = 104.83°
Ratio:a:b:c = 0.961 : 1 : 0.94
Unit Cell Volume:V 320.49 ų (Calculated from Unit Cell)
Z:4
Morphology:Botryoidal crusts.
Comment:On synthetic material

Optical Data of Rooseveltite

Type:Biaxial (+)
RI values: nα = 2.090 nβ = 2.150 nγ = 2.270
2V:Measured: 50° , Calculated: 62°
Maximum Birefringence:δ = 0.180

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Anisotropism:Very high indices of refraction.
Dispersion:extreme

Chemical Properties of Rooseveltite

Formula:
BiAsO
 
4
Essential elements:As, Bi, O
All elements listed in formula:As, Bi, O

Relationship of Rooseveltite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
CaHPO
 
4
8.AD.10Weilite
CaHAsO
 
4
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
8.AD.15Biphosphammite
(NH
 
4
,K)H
 
2
PO
 
4
8.AD.20Phosphammite
(NH
 
4
)
 
2
HPO
 
4
8.AD.25Buchwaldite
NaCaPO
 
4
8.AD.30Schultenite
PbHAsO
 
4
8.AD.35Chernovite-(Y)
YAsO
 
4
8.AD.35Dreyerite
BiVO
 
4
8.AD.35Wakefieldite-(Ce)
(Ce,Pb)VO
 
4
8.AD.35Wakefieldite-(Y)
YVO
 
4
8.AD.35Xenotime-(Y)
YPO
 
4
8.AD.35Pretulite
ScPO
 
4
8.AD.35Xenotime-(Yb)
(Yb,Y,HREE)PO
 
4
8.AD.35Wakefieldite-(La)
LaVO
 
4
8.AD.40Pucherite
BiVO
 
4
8.AD.45Ximengite
BiPO
 
4
8.AD.50Gasparite-(Ce)
(Ce,REE)AsO
 
4
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)PO
 
4
8.AD.50Monazite-(La)
(La,Ce,Nd)PO
 
4
8.AD.50Monazite-(Nd)
(Nd,La,Ce)PO
 
4
8.AD.50Cheralite
(Ca,Ce)(Th,Ce)[PO
 
4
]
 
2
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.50UM2005-35-VO:CaFePSiTh
(Th,Ca)[VO
 
4
,SiO
 
4
,PO
 
4
]
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg-Hg)
 
0.5
Hg
2+
 
[AsO
 
4
]
8.AD.65Clinobisvanite
BiVO
 
4
Related Minerals - Hey's Index Grouping:

- +
20.6.2Preisingerite
Bi
 
3
[O|OH|(AsO
 
4
)
 
2
]
20.6.3Arsenobismite
20.6.4Atelestite
Bi
 
8
[O
 
5
|(OH)
 
5
|(AsO
 
4
)
 
3
]
20.6.5Mixite
BiCu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
20.6.6Walpurgite
(BiO)
 
4
(UO
 
2
)[AsO
 
4
]
 
2
 · 3H
 
2
O

Other Names for Rooseveltite

Other Languages:
German:Rooseveltit
Russian:Рузвельтит
Spanish:Rooseveltita

Other Information

Other Information: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 Rooseveltite

Reference List:Herzenberg (1946) Facultad. Nac. de Ing., Univ. Téc. Oruro, Boliviqa, Bol. Téc., no. 1 (as Roosevelita).

American Mineralogist (1947): 32: 372.

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.: 697.

Tschermaks Mineralogische und Petrographische Mitteilungen (1972): 17: 71.

Acta Crystallographica (1982): B38: 1559-1561.

Internet Links for Rooseveltite

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    Localities for Rooseveltite

    Hide Locality List
    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.
    Argentina
     
    • San Juan
      • Calingasta
    		Lapis 8(4), 25 (1983)
    American Mineralogist (1982) 67:833-840; Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
    Bolivia
     
    • Potosí Department
      • Chayanta Province
        • Macha area
    		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: 697.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Horní Slavkov (Schlaggenwald)
          • Krásno
    		Sejkora, J., Ondruš, P., Fikar, M., Veselovský, F., Mach, Z., Gabašová, A., Skoda, R. & Beran, P. (2006): Supergene minerals at the Huber stock and Schnöd stock deposits, Krásno ore District, the Slavkovský les area, Czech Republic. Journal of the Czech Geological Society 51, 57-101.
      • Ústí Region
        • Krušné Hory Mts (Erzgebirge)
          • Dubí
    		Sejkora, J.: Minerály ložiska Moldava v Krušných horách. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 110-116.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Calw
    		Walenta, K. (1992): \"Die Mineralien des Schwarzwaldes\", Weise (Munich).
        • Oberkirch
          • Ödsbach
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schenkenzell
          • Wittichen
            • Burgfelsen
    		No reference listed
            • Heubach Valley
    		No reference listed
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schramberg
          • Falkenstein valley
    		No reference listed
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    • Saxony
      • Erzgebirge
        • Johanngeorgenstadt District
    		[Eur.J.Mineral. 13:167-175]
        • Schneeberg District
    		Lapis 30(7/8):67-68 (2005)
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
              • Hilarion area
    		No reference listed
    Portugal
     
    • Viana do Castelo District
      • Ponte de Lima
        • Estorãos
    		Nuno Afonso Collection
    Spain
     
    • Andalusia
      • Córdoba
        • Villanueva de Córdoba
    		Schnorrer, G. (2000): Die Minerale der ehemaligen Grube Espuela de San Miguel bei Villanueva de Cordoba, Prov. Cordoba in Spanien. Der Aufschluss, 51, 211-222. (in German)
    • Galicia
      • Ourense
        • Gomesende
    		Calvo, Miguel. Minerales y Minas de España, Vol III. Museo de Ciencias naturales de Álava. Pag. 614
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
            • Carrock Fell
    		Rumsey, M.S. (2007): UK Journal of Mines & Minerals (28), 51-53
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Oct 2009 16:32:47