Kottigite Mineral Data

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General Kottigite Information

Chemical Formula:

Zn3(AsO4)2•8(H2O)

Composition:

Molecular Weight = 618.13 gm

Zinc 31.74 % Zn 39.50 % ZnO

Arsenic 24.24 % As 37.18 % As₂O₅

Hydrogen 2.61 % H 23.32 % H₂O

Oxygen 41.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₃(AsO₄)₂•8(H₂O)

Environment:

Alteration of smaltite and sphalerite. Forms a series with erythrite and annabergite.

IMA Status:

Valid Species (Pre-IMA) 1850

Locality:

Daniel mine, Scheeberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Otto Köttig (1824-?), chemist of Schneeberg, Saxony, Germany.

Name Pronunciation:

Kottigite + Pronunciation

Synonym:

Koettigite

Kottigite Image

Images:

Kottigite

Comments: Köttigite crystals on gossanous matrix up to 0.5 cm in length.
Location: Oujela Mine, Mapimi, Durango, Mexico. Scale: Picture size 3 cm.
© John Veevaert

Kottigite Crystallography

Axial Ratios:

a:b:c =0.7639:1:0.3548

Cell Dimensions:

a = 10.241, b = 13.405, c = 4.757, Z = 2; beta = 105.21° V = 630.17 Den(Calc)= 3.26

Crystal System:

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

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

By Intensity(I/I_o): 6.703(1), 3.224(0.35), 7.954(0.27),

Forms:

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Forms: ( 1 0 0) ( 0 1 0) ( 2 2 1) ( 2 0 1) ( 1 1 0)

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Crystal Structure:

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Hill R J , American Mineralogist , 64 (1979) p.376-382, The crystal structure of kottigite

Physical Properties of Kottigite

Color:

Red, Brownish.

Density:

3.33

Diaphaneity:

Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

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

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Silky

Optical Properties of Kottigite

Gladstone-Dale:

CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1974,KPDmeas= 0.1933,KC= 0.2019
Ncalc = 1.66 - 1.67

Optical Data:

Biaxial (+), a=1.622, b=1.638, g=1.671, bire=0.0490, 2V(Calc)=72, 2V(Meas)=74.

Calculated Properties of Kottigite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Kottigite =3.26 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Kottigite= 31.88 barns/electron
U=PE_Kottigite x rElectron Density= 100.89 barns/cc.

Radioactivity:

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

Kottigite Classification

Dana Class:

40.03.06.05 (40)Hydrated Phosphates, etc

(40.03)where (A++)3 (XO4)2 · x(H2O)

(40.03.06)Vivianite Group

40.03.06.01 Vivianite Fe3(PO4)2•8(H2O) C 2/m 2/m

40.03.06.02 Baricite (Mg,Fe)3(PO4)2•8(H2O) C 2/m 2/m

40.03.06.03 Erythrite Co3(AsO4)2•8(H2O) I2/m 2/m

40.03.06.04 Annabergite Ni3(AsO4)2•8(H2O) I2/m 2/m

40.03.06.05 Kottigite Zn3(AsO4)2•8(H2O) C 2/m 2/m

40.03.06.06 Parasymplesite Fe3(AsO4)2•8(H2O) C 2/m 2/m

40.03.06.07 Hornesite Mg3(AsO4)2•8(H2O) I2/m 2/m

40.03.06.08 Arupite (Ni,Fe)3(PO4)2•8(H2O) I2/m 2/m

40.03.06.09 Pakhomovskyite! Co3(PO4)2•8(H2O) C 2/m 2/m

Strunz Class:

08.CE.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CE -With only medium-sized cations, RO4:H2O £ 1:2.5

08.CE.40 Arupite (Ni,Fe)3(PO4)2•8(H2O) I2/m 2/m

08.CE.40 Annabergite Ni3(AsO4)2•8(H2O) I2/m 2/m

08.CE.40 Baricite (Mg,Fe)3(PO4)2•8(H2O) C 2/m 2/m

08.CE.40 Erythrite Co3(AsO4)2•8(H2O) I2/m 2/m

08.CE.40 Ferrisymplesite Fe3(AsO4)2(OH)3•5(H2O) None

08.CE.40 Hornesite Mg3(AsO4)2•8(H2O) I2/m 2/m

08.CE.40 Kottigite Zn3(AsO4)2•8(H2O) C 2/m 2/m

08.CE.40 Manganohornesite (Mn,Mg)3(AsO4)2•8(H2O) P 2₁/c 2/m

08.CE.40 Parasymplesite Fe3(AsO4)2•8(H2O) C 2/m 2/m

08.CE.40 Vivianite Fe3(PO4)2•8(H2O) C 2/m 2/m

08.CE.40 Pakhomovskyite! Co3(PO4)2•8(H2O) C 2/m 2/m

Other Kottigite Information

References:

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

See Also:

Links to other databases for Kottigite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Kottigite

Zn3(AsO4)2•8(H2O)
Dana No: 40.03.06.05 Strunz No: 08.CE.40
Locality:

Notes: