Mineralogy Database

Santafeite Mineral Data

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General Santafeite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe,Al,Mg)2(Mn++++,Mn++)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3•2(H2O)
Help on Composition: 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
Help on Empirical Formula: 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)
Help on Environment: Environment: Uranium-vanadium deposits in a sabka limestone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1958
Help on Locality: Locality: Cliff face outcrop of the Todilto limestone, T13N-R10W Sec 25, Valencia county, New Mexico. Link to MinDat.org Location Data.
Help on Name Origin: 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.
Help on Name Pronunciation: Name Pronunciation: Santafeite + Pronunciation Say SANTAFEITE

Santafeite Image

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Comments: Brownish-black silky santafeite in rusty quartz.
Location: Monument Valley, Navajo County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Santafeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3083:1:0.211
Help on Cell Dimensions: Cell Dimensions: a = 9.25, b = 30, c = 6.33, Z = 4; V = 1,756.57 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: B2212
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 14.9(1), 2.702(0.5), 7.47(0.5),

Physical Properties of Santafeite

Help on Cleavage: Cleavage: {010} Perfect, {110} Distinct
Help on Color: Color: Black.
Help on Density: Density: 3.379
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: brown

Optical Properties of Santafeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.049 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2979,KPDmeas= 0.2989,KC= 0.2848
Ncalc = 1.96 - 1.97
Help on Optical Data: Optical Data: Biaxial (?), a=2.01
Help on Pleochroism (x): Pleochroism (x): dark reddish brown.
Help on Pleochroism (z): Pleochroism (z): yellowish brown.

Calculated Properties of Santafeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Santafeite =3.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0062142415
Boson Index = 0.9937857585
Help on Photoelectric: Photoelectric: PESantafeite = 19.36 barns/electron
U=PESantafeite x rElectron Density= 62.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Santafeite is Not Radioactive

Santafeite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.06)Dana Group Santafeite (Mn,Fe,Al,Mg)2(Mn,Mn)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3•2(H2O) B2212 2 2 2
Help on  Strunz Class: Strunz Class: 08.DM.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DM -With large and medium-sized cations, (OH, etc.):RO4 > 2:1
08.DM.40 Santafeite (Mn,Fe,Al,Mg)2(Mn,Mn)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3•2(H2O) B2212 2 2 2

Other Santafeite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Santafeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.DM.40





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