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Aurora mine, Sacramento District, White Pine Co., Nevada, USA
© 2008 Jesse Crawford
|System:||Trigonal||Colour:||Black, pale brown in ...|
|Lustre:||Metallic||Hardness:||2 - 3|
|Name:||Named in 1967 by Arthur S. Radtke, Charles M. Taylor, and Donnel Foster Hewett for the type locality.|
This page provides mineralogical data about Aurorite.
Classification of Aurorite
|Strunz 8th edition ID:||4/F.11-10|
|Nickel-Strunz 10th (pending) edition ID:||4.FL.20|
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
|Dana 7th edition ID:||18.104.22.168|
|Dana 8th edition ID:||22.214.171.124|
7 : MULTIPLE OXIDES
8 : AB3X7
|Hey's CIM Ref.:||7.18.12|
7 : Oxides and Hydroxides
18 : Oxides of Mn
Please feel free to link to this page.
Type Occurrence of Aurorite
|Type Locality:||North Aurora mine, Summit area, Treasure Hill, Silver Belt, White Pine District, White Pine Co., Nevada, USA|
|General Appearance of Type Material:||Small, irregular masses and platy or scaly grains, to 8 µm|
|Year of Discovery:||1967|
|Geological Setting of type material:||In veinlets filling microfractures in manganoan calcite|
|Associated Minerals at type locality:|
Physical Properties of Aurorite
|Colour:||Black, pale brown in transmitted light at the edges of very thin, platy grains|
|Hardness (Mohs):||2 - 3|
|Density (calculated):||3.81 g/cm3|
Crystallography of Aurorite
|Cell Parameters:||a = 7.514Å, c = 20.734Å|
|Ratio:||a:c = 1 : 2.759|
|Unit Cell Volume:||V 1,013.81 Å³ (Calculated from Unit Cell)|
|X-Ray Powder Diffraction:|
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
|X-Ray Powder Diffraction:|
|Comments:||Recorded on type material. The pattern is nearly indistinguishable from those of Chalcophanite and Jianshuiite.|
Optical Data of Aurorite
|Anisotropism:||Yellow-grey to brownish grey|
|Bireflectance:||Strong, cream-white to medium black|
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 36.5%.
R1 shown in black, R2 shown in red
Chemical Properties of Aurorite
|Essential elements:||H, Mn, O|
|All elements listed in formula:||Ag, Ca, H, Mn, O|
|Analytical Data:||Electron microprobe analysis of type material; Mn content (44.02 wt.-%) partitioned as MnO2 (59.99 wt.-%) by analogy to chalcophanite, the remainder reported as MnO; water content calculated from the mass balance|
MnO2 (59.99) SiO2 (0.11) Al2O3 (0.15) Fe2O3 (0.07) MnO (7.89) NiO (0.03) CuO (1.06) ZnO (0.25) PbO (1.30) MgO (0.12) CaO (2.50) BaO (3.07) Na2O (0.07) K2O (1.11) Ag2O (7.50) H2O (14.78) sum 100.00 wt.-%
Relationship of Aurorite to other Species
|Member of:||Chalcophanite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Aurorite
|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 Aurorite
Radtke, A. S., Taylor, C. M. and Hewett, D. F. (1967): Aurorite, argentian todorokite, and hydrous silver-bearing lead manganese oxide. Econ. Geol. 62, 186-206. - American Mineralogist (1967) 52, 1581 (abstract).
Grice, J. D., Gartrell, B., Gault, R. A. and Van Velthuizen, J. (1994): Ernienickelite, NiMn3O7 . 3H2O, a new mineral species from the Siberia complex, Western Australia: comments on the chalcophanite group. Canadian Mineralogist 32, 333-337.
Criddle, A. J. and Stanley, C. J., Eds. (1993): Quantitative data file for ore minerals, 3rd. ed., Chapman & Hall (London), 29.
Anthony, J. W. e t al. (1997): Handbook of Mineralogy, Vol. 3, 30.
Internet Links for Aurorite
Localities for Aurorite
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.
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New Locality Added: Alais meteorite, Gard, Languedoc-Roussillon, FranceFrom Lon Clay Hill, 9th Dec 2013 14:09:10