Santafeite
A valid IMA mineral species - grandfathered
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About Santafeite
Santa Fe locomotive
Formula:
(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2O
Colour:
Black
Lustre:
Adamantine
Specific Gravity:
3.379
Crystal System:
Orthorhombic
Name:
Named by R. S. Sun and R. H. Weber in 1958 after the Atchison, Topeka and Santa Fe Railroad Company for its pioneering exploration and development activities in connection with the uranium deposits of New Mexico.
Type Locality:
This page provides mineralogical data about Santafeite.
Unique Identifiers
Mindat ID:
3525
Long-form identifier:
mindat:1:1:3525:1
IMA Classification of Santafeite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Ca,Sr,Na)3(Mn2+,Fe3+)2Mn4+2(V5+O4)4(OH,O)5·2H2O
First published:
1958
Classification of Santafeite
8.DM.40
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1
42.9.7.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
21.4.16
21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
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 for Standard |
|---|---|---|
| Sfe | 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 Santafeite
Adamantine
Transparency:
Translucent, Opaque
Colour:
Black
Streak:
Brown
Tenacity:
Very brittle
Cleavage:
Very Good
{010} perfect, {110} distinct
{010} perfect, {110} distinct
Density:
3.379 g/cm3 (Measured) 3.39 g/cm3 (Calculated)
Optical Data of Santafeite
Type:
Biaxial
RI values:
nα = 2.01
Max. Birefringence:
δ = 0.000
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
relatively weak
Optical Extinction:
Parallel, X = c.
Pleochroism:
Strong
Comments:
Dark reddish brown to yellowish brown.
Comments:
Absorption: X > Y > Z.
Chemistry of Santafeite
Mindat Formula:
(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2O
Element Weights:
Crystallography of Santafeite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 9.25(2) Å, b = 30.00(2) Å, c = 6.33(2) Å
Ratio:
a:b:c = 0.308 : 1 : 0.211
Unit Cell V:
1,756.58 ų (Calculated from Unit Cell)
Z:
4
Comment:
B2212
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 14.88 Å | (100) |
| 7.47 Å | (50) |
| 2.788 Å | (40) |
| 1.667 Å | (40) |
| 3.66 Å | (30) |
| 3.39 Å | (50) |
Comments:
Grants district, NM
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Santafeite
General Appearance of Type Material:
Incrustation in small rosettes of acicular crystals.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 115882, 121957.
Geological Setting of Type Material:
On vertical joint surfaces of limestone.
Associated Minerals at Type Locality:
Other Language Names for Santafeite
Common Associates
Associations Based on Photo Data:
| 3 photos of Santafeite associated with Quartz | SiO2 |
| 3 photos of Santafeite associated with Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| 1 photo of Santafeite associated with Metatyuyamunite | Ca(UO2)2(VO4)2 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DM. | Tomsquarryite | NaMgAl3(PO4)2(OH)6 · 8H2O |
| 8.DM. | Elliottite | NaMgAl3(PO4)2F6 · 9H2O |
| 8.DM. | Betpakdalite-FeFe | [Fe3+2 (H2O)15(OH)2Fe3+(H2O)6][Mo8As2Fe3+3O37] |
| 8.DM. | Penriceite | [Mg(H2O)6][Na(H2O)2Al3(PO4)2F6] · H2O |
| 8.DM. | Betpakdalite-CaMg | [Ca2(H2O)17Mg(H2O)6][Mo8As2Fe3+3O36(OH)] |
| 8.DM. | Chinnerite | [Mg(H2O)6]Na(H2O)2Al3(PO4)2F6 |
| 8.DM. | Sarrochite | [Ca4(H2O)38][Mo8P2Fe3+3O37(OH)] |
| 8.DM.05 | Esperanzaite | NaCa2Al2(AsO4)2(OH)F4 · 2H2O |
| 8.DM.05 | Morinite | NaCa2Al2(PO4)2(OH)F4 · 2H2O |
| 8.DM.10 | Alexshubnikovite | Ca2Cu9(AsO4)4(OH)9Cl(H2O)8 · 2H2O |
| 8.DM.10 | Tangdanite | Ca2Cu9(AsO4)4(SO4)0.5(OH)9 · 9H2O |
| 8.DM.10 | Tyrolite | Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O |
| 8.DM.15 | Melkovite | [Ca2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O36(OH)] |
| 8.DM.15 | Betpakdalite-NaCa | [Na2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O34(OH)3] |
| 8.DM.15 | Betpakdalite-CaCa | [Ca2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O36(OH)] |
| 8.DM.20 | Phosphovanadylite-Ba | Ba[V4+4P2O8(OH)8] · 12H2O |
| 8.DM.20 | Phosphovanadylite-Ca | Ca[V4+4P2O12(OH)4] · 12H2O |
| 8.DM.25 | Yukonite | Ca3Fe3+(AsO4)2(OH)3 · 5H2O |
| 8.DM.30 | Uduminelite | Ca3Al8(PO4)2O12 · 2H2O |
| 8.DM.35 | Aldermanite | [Mg(H2O)6][Na(H2O)2Al3(PO4)2(OH,F)6] · H2O |
| 8.DM.35 | 'Azovskite' | Fe3+3(PO4)(OH)6 or near |
| 8.DM.35 | Delvauxite | CaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed |
| 8.DM.55 | Tapiaite | Ca5Al2(AsO4)4(OH)4 · 12H2O |
| 8.DM.60 | Alcantarillaite | [Fe3+0.5(H2O)4][CaAs3+2(Fe3+2.5W6+0.5)(AsO4)2O7] |
Other Information
Notes:
Readily fusible in an alcohol flame to a dull black bead.
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 Santafeite
mindat.org URL:
https://www.mindat.org/min-3525.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Santafeite
Reference List:
Sun, Ming-Shan, Weber, Robert H. (1958) Santafeite, a new hydrated vanadate from New Mexico. American Mineralogist, 43 (7-8) 677-687
Dunn, Pete J., Peacor, Donald R. (1986) Santafeite, a re-examination and new empirical formula. Mineralogical Magazine, 50 (356) 299-300 doi:10.1180/minmag.1986.050.356.16
Localities for Santafeite
Showing 5 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Italy | |
| Balestra et al. (2012) |
Mexico | |
| Planer-Friedrich (2000) |
USA | |
| Anthony et al. (1995) |
| Sun et al. (1958) +1 other reference |
| Collected by and EDS analyzed by Joy ... |
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Unnamed U mine [1], McKinley County, New Mexico, USA