Santanaite
A valid IMA mineral species
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Formula:
Pb11(CrO4)O12
Colour:
Straw-yellow
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
9.155 (Calculated)
Crystal System:
Hexagonal
Name:
Named after its discovery locality.
Needs restudy.
Unique Identifiers
Mindat ID:
3526
Long-form identifier:
mindat:1:1:3526:8
GUID
(UUID V4):
(UUID V4):
bbcb1128-b86c-48b7-b441-2fae601a4642
IMA Classification of Santanaite
Approved
IMA Formula:
Pb11CrO16
Approval year:
1971
First published:
1972
Classification of Santanaite
7.FB.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
B : With additional O,V, S, Cl
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
B : With additional O,V, S, Cl
Dana 7th ed.:
35.4.1.1
35.4.1.1
35 : ANHYDROUS CHROMATES
4 : Miscellaneous
35 : ANHYDROUS CHROMATES
4 : Miscellaneous
27.2.7
27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates
27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
San | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Santanaite
Adamantine
Colour:
Straw-yellow
Hardness:
4 on Mohs scale
Cleavage:
Perfect
{0001} perfect, also {1210} and rarely {1010}
{0001} perfect, also {1210} and rarely {1010}
Density:
9.155 g/cm3 (Calculated)
Optical Data of Santanaite
Type:
Uniaxial (-)
RI values:
nω = 2.320 nε = 2.120
Max Birefringence:
δ = 0.200
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Colour in reflected light:
Dirty gray-brown colors
Pleochroism:
Weak
Chemistry of Santanaite
Mindat Formula:
Pb11(CrO4)O12
Elements listed:
Crystallography of Santanaite
Crystal System:
Hexagonal
Class (H-M):
6 2 2 - Trapezohedral
Space Group:
P63 2 2
Cell Parameters:
a = 9.03 Å, c = 39.84 Å
Ratio:
a:c = 1 : 4.412
Unit Cell V:
2,813.36 ų (Calculated from Unit Cell)
Z:
6
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.539 Å | (100) |
2.948 Å | (40) |
2.606 Å | (80) |
2.243 Å | (40) |
2.100 Å | (40) |
2.080 Å | (50) |
1.701 Å | (50) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47e : [Vanadates, chromates, manganates] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Santanaite
General Appearance of Type Material:
Aggregates of platelets up to 0.5 mm long, 0.2 mm wide, in a druse surrounded by corroded galena.
Place of Conservation of Type Material:
No designated type material.
Associated Minerals at Type Locality:
Reference:
Mücke, A. (1972) Santanait, ein neues Bleichromat-Mineral. Neues Jahrbuch für Mineralogie, Monatshefte: 1972: 455-458.
Other Language Names for Santanaite
German:Santanait
Spanish:Santanaita
Related Minerals - Strunz-mindat Grouping
7.FB.05 | Phoenicochroite | Pb2(CrO4)O |
7.FB.05 | Georgerobinsonite | Pb4(CrO4)2(OH)2FCl |
7.FB.15 | Wattersite | [Hg2]2+2Hg2+[CrO4]O2 |
7.FB.20 | Deanesmithite | [Hg2]2+Hg2+3[CrO4]S2O |
7.FB.25 | Edoylerite | Hg2+3(CrO4)S2 |
7.FB.30 | Reynoldsite | Pb2Mn4+2O5(CrO4) |
Other Information
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 Santanaite
mindat.org URL:
https://www.mindat.org/min-3526.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Santanaite
Reference List:
Localities for Santanaite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Chile (TL) | |
|