Wilcoxite Mineral Data (original) (raw)

General Wilcoxite Information

Help on Chemical Formula: Chemical Formula:

MgAl(SO4)2F•18(H2O)

Help on Composition: Composition:

Molecular Weight = 586.69 gm

Magnesium 4.14 % Mg 6.87 % MgO

Aluminum 4.60 % Al 8.69 % Al2O3

Hydrogen 6.18 % H 55.27 % H2O

Sulfur 10.93 % S 27.29 % SO3

Oxygen 70.90 % O

Fluorine 3.24 % F 3.24 % F

- % F -1.36 % -O=F2

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

MgAl(SO4)2F•18(H2O)

Help on Environment: Environment:

Post mining product in oxidizable sulfide deposits containing fluorine bearing minerals.

Help on IMA Status: IMA Status:

Approved IMA 1983

Help on Locality: Locality:

Lone Pine mine, Catron County, New Mexico. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after William Wilcox, who discovered this mining district in 1879. He was killed by Apache Indians in 1880.

Help on Name Pronunciation: Name Pronunciation:

Wilcoxite + Pronunciation Say WILCOXITE

Wilcoxite Image

Click Here for Larger Wilcoxite Image in a New Browser Window Images:

Click Here for Larger Wilcoxite Image Wilcoxite Comments: Small, transparent crystals of wilcoxite. Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany.Scale: Picture size 0.8 mm. © Thomas Witzke / Abraxas-Verlag

Wilcoxite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =2.2406:1:1.018

Help on Cell Dimensions: Cell Dimensions:

a = 14.9, b = 6.65, c = 6.77, Z = 1; alpha = 117.433°, beta = 100.583°, gamma = 89.167° V = 585.18 Den(Calc)= 1.66

Help on Crystal System: Crystal System:

TriclinicSpace Group: P 1,P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 4.908(1), 5.654(0.9), 4.371(0.6),

Physical Properties of Wilcoxite

Help on Color: Color:

Colorless, White.

Help on Density: Density:

1.58

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Habit: Habit:

Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.

Help on Habit: Habit:

Encrustations - Forms crust-like aggregates on matrix.

Help on Habit: Habit:

Water Soluble - Water soluble mineral.

Help on Hardness: Hardness:

2 - Gypsum

Help on Streak: Streak:

white

Optical Properties of Wilcoxite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2591,KPDmeas= 0.2738,KC= 0.2695
Ncalc = 1.43 - 1.45

Help on Optical Data: Optical Data:

Biaxial (-), a=1.424, b=1.436, g=1.438, bire=0.0140, 2V(Calc)=44, 2V(Meas)=48. Dispersion not discernible.

Calculated Properties of Wilcoxite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=1.67 gm/cc
note: Specific Gravity of Wilcoxite =1.58 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0053122098
Boson Index = 0.9946877902

Help on Photoelectric: Photoelectric:

PEWilcoxite = 1.06 barns/electron
U=PEWilcoxite x rElectron Density= 1.77 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wilcoxite is Not Radioactive

Wilcoxite Classification

Help on Dana Class: Dana Class:

31.09.09.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.09)where (A+ B++) (XO4) Zq�x(H2O)

(31.09.09)Dana Group

31.09.09.01 Wilcoxite MgAl(SO4)2F•18(H2O) P 1,P1 Tri

Help on Strunz Class: Strunz Class:

07.DE.45 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DE -With only medium-sized cations; unclassified

07.DE.45 Wilcoxite MgAl(SO4)2F•18(H2O) P 1,P1 Tri

Other Wilcoxite Information

Help on References: References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Wilcoxite :
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

Search for Wilcoxite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Wilcoxite :

A Bijoux Google Search for Wilcoxite
Adam's Minerals Google Search for Wilcoxite
Cape Minerals Google Search for Wilcoxite
Dakota Matrix Minerals Google Search for Wilcoxite
Excalibur Mineral Corp. Google Search for Wilcoxite
Exceptional Minerals Google Search for Wilcoxite
John Betts Fine Minerals Search for Wilcoxite
McDougall Minerals Google Search for Wilcoxite
Mineral News Website Link
Rock and Mineral Shows Google Search for Wilcoxite
Weinrich Minerals, Inc. Google Search for Wilcoxite

Ask about Wilcoxite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Wilcoxite Specimen Label here :

Wilcoxite

MgAl(SO4)2F•18(H2O)
Dana No: 31.09.09.01 Strunz No: 07.DE.45
Locality:

Notes: