Squawcreekite Mineral Data
General Squawcreekite Information
Chemical Formula:
(Fe+++,Sb+++++,W++++++)O4•(H2O)
Composition:
Molecular Weight = 262.07 gm
Iron 19.18 % Fe 27.42 % Fe2 O3
Antimony 41.81 % Sb 55.55 % Sb2 O5
Hydrogen 0.77 % H 6.87 % H2 O
Tungsten 7.72 % W 9.73 % WO3
Oxygen 30.52 % O
______ ______
100.00 % 99.57 % = TOTAL OXIDE
Empirical Formula:
Fe3+ 0.9 Sb0.9 W0.11 O4 •(H2 O)
Environment:
Occurs adjacent to hematite-cassiterite veins in rhyolite and with cassiterite at Esperansa tin mine, near Durango, Mexico. Approved IMA 1988, Redefined to tripuhyite (IMA Code 02-A ).
IMA Status:
Discredited IMA 2002
Locality:
Type locality is Squaw Creek, Catron County, New Mexico. Link to MinDat.org Location Data.
Name Origin:
Named in 1991after its locality.
Name Pronunciation:
Squawcreekite + Pronunciation
Synonym:
Discredited IMA 2002
IMA1987-022
IMA2002-A
Squawcreekite Image
Images:
Squawcreekite Tripuhyite
Comments: Micro red-orange squawcreekite crystals in matrix. The mineral is now considered to be a Zn-bearing variety of Tripuhyite.
Location: Squaw Creek Tin Mine, Catron County, New Mexico.
Scale: Not Given.
© Diederik Visser
Squawcreekite Crystallography
Axial Ratios:
a:c = 1:0.66432
Cell Dimensions:
a = 4.6673, c = 3.1006, Z = 1; V = 67.54 Den(Calc)= 6.44
Crystal System:
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm
X Ray Diffraction:
By Intensity(I/Io ): 3.3039(1), 2.5844(0.49), 1.7316(0.36),
Physical Properties of Squawcreekite
Cleavage:
{100} Imperfect
Color:
Yellowish brown.
Diaphaneity:
Transparent
Hardness:
6-6.5 - Orthoclase-Pyrite
Luster:
Adamantine
Streak:
yellowish brown
Optical Properties of Squawcreekite
Dichroism (e):
pale yellow.
Dichroism (w):
medium yellow brown.
Gladstone-Dale:
CI calc = 0.096 (Poor) - where the CI = (1-KPDcalc /KC ) KPDcalc = 0.191,KC = 0.2114 Ncalc = 2.36
Optical Data:
Uniaxial (+), w=2.18, e=2.28, bire=0.1000.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Squawcreekite in Air
λ
R1
R 2
∑ R1 (λ)
∑ R2 (λ)
470 nm
16.90
17.60
546 nm
13.90
16.60
589 nm
12.50
15.50
650 nm
15.10
18.30
Calculated Relative Intensity Colors of Squawcreekite in Air
Relative Intensity
0%
70%
100%
140%
210%
280%
350%
420%
490%
560%
630%
640%
R1
R2
Calculated Properties of Squawcreekite
Electron Density:
Bulk Density (Electron Density)=5.87 gm/cc note: Specific Gravity of Squawcreekite =6.44 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PESquawcreekite = 232.42 barns/electronU=PESquawcreekite x r Electron Density=1,364.31 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Squawcreekite is Not Radioactive
Squawcreekite Classification
Dana Class:
04.04.01.08 (04) Simple Oxides
(04.04) with a cation charge of 4+ (A++++ O2)
(04.04.01) Rutile group (Tetragonal: P4/mnm)
04.04.01.01 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
04.04.01.02 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m
04.04.01.03 Struverite ? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m
04.04.01.04 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
04.04.01.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
04.04.01.06 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
04.04.01.07 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
04.04.01.08 Squawcreekite ? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m
04.04.01.09 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m
Strunz Class:
04.DB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
04.D - Metal:Oxygen = 1:2 and similar
04.DB -With medium-sized cations; chains of edge-sharing octahedra
04.DB.05 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Varlamoffite * (Sn,Fe)(O,OH)2 P 41 /mnm 4/m 2/m 2/m
04.DB.05 Squawcreekite ? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m
04.DB.05 Tugarinovite MoO2 P 21 /n 2/m
04.DB.05 Tripuhyite FeSbO4 P 41 /mnm 4/m 2/m 2/m
Other Squawcreekite Information
References:
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.77,p449,1992) OPTIC PROP.(AntBidBlaNic3)
See Also:
Links to other databases for Squawcreekite :
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 (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST
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Squawcreekite
(Fe+++,Sb+++++,W++++++)O4•(H2O)
Dana No: 04.04.01.08 Strunz No: 04.DB.05
Locality:
Notes:
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