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 % Fe₂O₃

Antimony 41.81 % Sb 55.55 % Sb₂O₅

Hydrogen 0.77 % H 6.87 % H₂O

Tungsten 7.72 % W 9.73 % WO₃

Oxygen 30.52 % O

______ ______

100.00 % 99.57 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_0.9Sb_0.9W_0.11O₄•(H₂O)

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:

Click Here for Larger Squawcreekite Image

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 DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.3039(1), 2.5844(0.49), 1.7316(0.36),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Help on Above

Basso R , Cabella R , Lucchetti G , Marescotti P , Martinelli A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2003 (2003) p.407-420, Structural studies on synthetic and natural Fe-Sb-oxides of MO2 type, Locality: synthetic

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	R₂	∑ 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:

PE_{Squawcreekite}= 232.42 barns/electron
U=PE_{Squawcreekite} x rElectron 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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Print or Cut-and-Paste your Squawcreekite Specimen Label here :

Squawcreekite

(Fe+++,Sb+++++,W++++++)O4•(H2O)
Dana No: 04.04.01.08 Strunz No: 04.DB.05
Locality:

Notes: