Zincostaurolite Mineral Data (original) (raw)

General Zincostaurolite Information

Help on Chemical Formula: Chemical Formula:

[ ]4Zn4Al16(Al,[ ])2Si8O40[O6,(OH)2]

Help on Composition: Composition:

Molecular Weight = 1,667.40 gm

Lithium 0.21 % Li 0.46 % Li2O

Magnesium 0.28 % Mg 0.46 % MgO

Titanium 0.06 % Ti 0.10 % TiO2

Aluminum 29.01 % Al 54.82 % Al2O3

Zinc 9.61 % Zn 11.96 % ZnO

Iron 1.11 % Fe 1.42 % FeO

Silicon 13.48 % Si 28.83 % SiO2

Hydrogen 0.22 % H 1.98 % H2O

Oxygen 46.03 % O

______ ______

100.00 % 100.02 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Fe2+0.13Mg0.1Zn2.45Li0.51Fe2+0.2Al15.98Ti0.02Al1.95Mg0.09Si8O44.3(OH)3.67

Help on Environment: Environment:

Meta-bauxite in a karst-filled limestone (marbles).

Help on IMA Status: IMA Status:

Approved IMA 2003 (Dana #Added)

Help on Locality: Locality:

Zermatt Valley, Swiss Western Alps Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named as the Zinc-dominant analog of staurolite.

Help on Synonym: Synonym:

IMA1992-036

Zincostaurolite Image

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

Click Here for Larger Zincostaurolite Image Zincostaurolite Comments: BSE image of zincostaurolite (St) grain replaced by Na-Ca-Li mica (Mi), gahnite Gah), Fe-Mn hydroxide (small rounded bright grains) and diaspore (darkest grains in upper left corner). Matrix consists of calcite (Cal). Location: Diaspore-bearing metabauxite from East Samos, Agean Sea, Greece. (AmMin v88:789).Scale: See Image. © American Mineralogist

Zincostaurolite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.4749:1:0.341

Help on Cell Dimensions: Cell Dimensions:

a = 7.853, b = 16.534, c = 5.639, Z = 0.7; beta = 90° V = 732.18 Den(Calc)= 2.65

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 1.391(1)(462), 2.39(0.87)(132), 2.678(0.71)(151),1.9868(0.61)(062), 3.001(0.61)(221),

Click Here for Large Zincostaurolite Structure Window Crystal Structure:

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Help on Above

| | Chopin C , Goffe B , Ungaretti L , Oberti R , European Journal of Mineralogy , 15 (2003) p.167-176, Magnesiostaurolite and zincostaurolite: mineral description with a petrogenetic, and crystal-chemical update | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Zincostaurolite

Help on Color: Color:

Colorless.

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Habit: Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Help on Hardness: Hardness:

7-7.5 - Quartz-Garnet

Help on Luster: Luster:

Vitreous - Resinous

Help on Streak: Streak:

white

Optical Properties of Zincostaurolite

Help on Gladstone-Dale: Gladstone-Dale:

CI calc= -0.344 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2747,KC= 0.2044
Ncalc = 1.54

Help on Optical Data: Optical Data:

Biaxial (+), a=1.722, g=1.734, bire=0.0120

Calculated Properties of Zincostaurolite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Zincostaurolite =2.65 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEZincostaurolite = 6.40 barns/electron
U=PEZincostaurolite x rElectron Density= 16.65 barns/cc.

Help on Radioactivity: Radioactivity:

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

Zincostaurolite Classification

Help on Dana Class: Dana Class:

52.02.03.03 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.02)with cations in [4] and >[4] coordination

(52.02.03)Dana Group

52.02.03.01 Staurolite (Fe,Mg)2Al9(Si,Al)4O20(O,OH)4 C 2/m 2/m

52.02.03.02 Magnesiostaurolite! []4Mg4Al16(Al,[])2Si8O40[O6,(OH)2] C 2/m 2/m

52.02.03.03 Zincostaurolite! []4Zn4Al16(Al,[])2Si8O40[O6,(OH)2] C 2/m 2/m

Help on Strunz Class: Strunz Class:

09.AF.30 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AF -Nesosilicates with additional anions;

09.AF.30 Staurolite (Fe,Mg)2Al9(Si,Al)4O20(O,OH)4 C 2/m 2/m

09.AF.30 Magnesiostaurolite! []4Mg4Al16(Al,[])2Si8O40[O6,(OH)2] C 2/m 2/m

09.AF.30 Zincostaurolite! []4Zn4Al16(Al,[])2Si8O40[O6,(OH)2] C 2/m 2/m

Other Zincostaurolite Information

Help on References: References:

NAME( AmMin, v 88, p 1626) PHYS. PROP.(AmMin, v 88, p 1626) OPTIC PROP.(AmMin, v 88, p 1626)

Help on See Also: See Also:

Links to other databases for Zincostaurolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Zincostaurolite

[ ]4Zn4Al16(Al,[ ])2Si8O40[O6,(OH)2]
Dana No: 52.02.03.03 Strunz No: 09.AF.30
Locality:

Notes: