Rooseveltite (original) (raw)
A valid IMA mineral species - grandfathered
About RooseveltiteHide
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Colour:
White to pale gray, pale green, yellow
Specific Gravity:
6.86 - 7.01
Crystal System:
Monoclinic
Name:
Named in honor of Franklin Delano Roosevelt (30 January 1882, Hyde Park, New York, USA - 12 April 1945, Warm Springs, Georgia, USA), 32nd President of the United States of America.
This page provides mineralogical data about Rooseveltite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3444:5
e732ace4-30e7-4e04-b9fa-cb903b59a285
IMA Classification of RooseveltiteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
Classification of RooseveltiteHide
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8.AD.50
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
38.4.4.1
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
20.6.1
20 : Arsenates (also arsenates with phosphate, but without other anions)
6 : Arsenates of Bi
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Roo | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of RooseveltiteHide
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Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Sorry, your browser doesn't support HTML5 audio. | Jolyon Ralph | United Kingdom |
Physical Properties of RooseveltiteHide
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Colour:
White to pale gray, pale green, yellow
Hardness:
VHN25=513 kg/mm2 - Vickers
Fracture:
Irregular/Uneven, Conchoidal
Density:
6.86 - 7.01 g/cm3 (Measured) 7.21 g/cm3 (Calculated)
Optical Data of RooseveltiteHide
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RI values:
_n_α = 2.090 _n_β = 2.150 _n_γ = 2.270
2V:
Measured: 50° , Calculated: 62°
δ = 0.180
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Anisotropism:
Very high indices of refraction.
Chemistry of RooseveltiteHide
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Crystallography of RooseveltiteHide
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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 V:
320.49 ų (Calculated from Unit Cell)
Morphology:
Botryoidal crusts.
Comment:
On synthetic material
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009764 | Rooseveltite | Bedlivy D, Mereiter K (1982) Structure of alpha-BiAsO4 (rooseveltite) Acta Crystallographica B38 1559-1561 |  |
1982 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.15 Å | (100) |
| 2.97 Å | (80) |
| 3.33 Å | (61) |
| 2.98 Å | (37) |
| 4.82 Å | (36) |
| 2.70 Å | (36) |
| 2.50 Å | (26) |
Geological EnvironmentHide
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Type Occurrence of RooseveltiteHide
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General Appearance of Type Material:
Crystalline crust on wood tin veinlets.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA, 101938.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 115317.
Geological Setting of Type Material:
Veinlets in rhyolitic and dacitic lava flows.
Associated Minerals at Type Locality:
Reference:
Herzenberg, R. (1946) Rooseveltita. in Nuevos Minerales de Bolivia: 10-11.
Other Language Names for RooseveltiteHide
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Relationship of Rooseveltite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for RooseveltiteHide
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References for RooseveltiteHide
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Reference List:
Localities for RooseveltiteHide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.