Santafeite Mineral Data + 
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- 42.9.6.1 Santafeite (Mn,Fe,Al,Mg)2(Mn,Mn)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3·2(H2O) B2212 2 2 2
- VII/D.45-10 Santafeite (Mn,Fe,Al,Mg)2(Mn,Mn)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3·2(H2O) B2212 2 2 2
General Santafeite Information |
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 Chemical Formula: |
(Mn,Fe,Al,Mg)2(Mn++++,Mn++)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3·2(H2O) | ||
| Composition: |
Molecular Weight = 896.52 gm | ||
| Sodium 3.59 % Na 4.84 % Na2O | |||
| Strontium 6.84 % Sr 8.09 % SrO | |||
| Calcium 3.58 % Ca 5.00 % CaO | |||
| Magnesium 0.54 % Mg 0.90 % MgO | |||
| Manganese 20.83 % Mn 13.45 % MnO / 16.49 % MnO2 | |||
| Aluminum 0.60 % Al 1.14 % Al2O3 | |||
| Vanadium 20.46 % V 36.52 % V2O5 | |||
| Iron 0.62 % Fe 0.89 % Fe2O3 | |||
| Arsenic 2.51 % As 3.85 % As2O5 | |||
| Hydrogen 0.81 % H 7.23 % H2O | |||
| Oxygen 39.62 % O | |||
| ______ ______ | |||
| 100.00 % 98.39 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na1.4Ca0.8Sr0.7Mn2+1.4Mg0.2Al0.2Fe3+0.1Mn4+1.7Mn2+0.3(VO4)3.6(AsO4)0.3 (OH)3O1.5·2.1(H2O) | ||
| Environment: |
Uranium-vanadium deposits in a sabka limestone. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1958 | ||
| Locality: |
Cliff face outcrop of the Todilto limestone, T13N-R10W Sec 25, Valencia county, New Mexico. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the Atchison, Topeka and Santa Fe Railroad Company, because if its contribution to the exploration and development of the New Mexico uranium deposits. | ||
Santafeite Image | |||
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Images:
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Santafeite Crystallography |
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| Axial Ratios: |
a:b:c =0.3083:1:0.211 | ||
| Cell Dimensions: |
a = 9.25, b = 30, c = 6.33, Z = 4; V = 1,756.57 Den(Calc)= 3.39 | ||
| Crystal System: |
Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: B2212 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 14.9(1), 2.702(0.5), 7.47(0.5), | ||
Physical Properties of Santafeite |
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| Cleavage: |
[010] Perfect, [110] Distinct | ||
| Color: |
Black. | ||
| Density: |
3.379 | ||
| Diaphaniety: |
Opaque to translucent | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Acicular - Occurs as needle-like crystals. | ||
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | ||
| Luster: |
Subadamantine | ||
| Streak: |
brown | ||
Optical Properties of Santafeite |
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| Optical Data: |
Biaxial (?), a=2.01 | ||
| Pleochroism (x): |
dark reddish brown. | ||
| Pleochroism (z): |
yellowish brown. | ||
Calculated Properties of Santafeite |
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| Electron Density: |
relectron=3.24 gm/cc |
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| Fermion Index |
Fermion Index = 0.00621 Boson Index = 0.99379 |
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| Photoelectric: |
PESantafeite = 19.36 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Santafeite is Not Radioactive |
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Santafeite Classification |
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| Dana Class: |
42.9.6.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
| (42.9)where (A)3 (XO4)2 Zq · x(H2O) | |||
| (42.9.6)Dana Group | |||
| Strunz Class: |
VII/D.45-10 VII - Phosphates, Arsenates and Vanadates | ||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K | |||
| VII/D.45 - Santafeite series | |||
Other Santafeite Information |
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| References: |
NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4) | ||
| See Also: |
Links to other databases for Santafeite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Santafeite using: Visit our Advertisers for Santafeite : Translate Santafeite Mineral Data : Ask about Santafeite here : Print or Cut-and-Paste your Santafeite Specimen Label here :
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