Squawcreekite Mineral Data

Squawcreekite Mineral Data +

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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.

Synonym:

Discredited IMA 2002

IMA1987-022

IMA2002-A

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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:

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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.

Diaphaniety:

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

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:

r_electron=5.87 gm/cc
note: r_{Squawcreekite}=6.44 gm/cc.

Fermion Index

Fermion Index = 0.01523
Boson Index = 0.98477

Photoelectric:

PE_{Squawcreekite}= 232.42 barns/electron
U=PE_{Squawcreekite} x r_electron=1,364.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Squawcreekite is Not Radioactive

Squawcreekite Classification

Dana Class:

4.4.1.8 (4)Simple Oxides

(4.4)with a cation charge of 4+ (A++++ O2)

(4.4.1)Rutile group (Tetragonal: P4/mnm)

4.4.1.1 Rutile TiO2 P 4/mnm 4/m 2/m 2/m

4.4.1.2 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m

4.4.1.3 Struverite (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m

4.4.1.4 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m

4.4.1.5 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m

4.4.1.6 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m

4.4.1.7 Argutite GeO2 P 4/mnm 4/m 2/m 2/m

4.4.1.8 Squawcreekite ? (Fe,Sb,W)O4·(H2O) P 4/mnm 4/m 2/m 2/m

4.4.1.9 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m

Strunz Class:

IV/D.02-30 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.02 - Rutile group, Rutile - Cassiterite - Platnerite series

IV/D.02-10 Rutile TiO2 P 4/mnm 4/m 2/m 2/m

IV/D.02-20 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m

IV/D.02-30 Squawcreekite (Fe,Sb,W)O4·(H2O) P 4/mnm 4/m 2/m 2/m

IV/D.02-40 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m

IV/D.02-45 Argutite GeO2 P 4/mnm 4/m 2/m 2/m

IV/D.02-50 Paratellurite TeO2 P 4₁2₁2,P 4₃2₁2 4 2 2

IV/D.02-60 Plattnerite PbO2 P 4/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 -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 - WWW-MINCRYST 13 -École des Mines de Paris

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Squawcreekite

(Fe+++,Sb+++++,W++++++)O4·(H2O)
Dana No: 4.4.1.8 Strunz No: IV/D.02-30
Locality:

Notes: