Kraisslite Mineral Data

General Kraisslite Information

Chemical Formula:

(Mn++,Mg)24Zn3Fe+++(As+++O3)2(As+++++O4)3(SiO4)6(OH)18

Composition:

Molecular Weight = 3,019.54 gm

Magnesium 1.53 % Mg 2.54 % MgO

Manganese 40.03 % Mn 51.68 % MnO

Zinc 6.93 % Zn 8.63 % ZnO

Iron 1.29 % Fe 1.85 % Fe₂O₃

Silicon 5.95 % Si 12.74 % SiO₂

Arsenic 11.66 % As 6.55 % As₂O₃ / 10.28 % As₂O₅

Hydrogen 0.60 % H 5.37 % H₂O

Oxygen 32.00 % O

______ ______

100.00 % 99.63 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₂₂Mg_1.9Zn_3.2Fe³⁺_0.7(AsO₃)₂(AsO₄)_2.7(SiO₄)_6.4(OH)₁₈

Environment:

Secondary mineral in the zincite zone of a metamorphosed stratiform zinc deposit.

IMA Status:

Approved IMA 1978

Locality:

Sterling Hill mine, Ogdensburg, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Frederick Kraissl, Jr. (1899-1986) and Alice L. Kraissl (1905-1986), of Hackensack, New Jersey.

Name Pronunciation:

Kraisslite + Pronunciation

Kraisslite Image

Images:

Kraisslite

Comments: Yellow crystalline kraisslite in calcite.
Location: Sterling Mine, Ogdensburg, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kraisslite Crystallography

Axial Ratios:

a:c = 1:5.33819

Cell Dimensions:

a = 8.22, c = 43.88, Z = 2; V = 2,567.68 Den(Calc)= 3.91

Crystal System:

Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6₃22

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

By Intensity(I/I_o): 2.74(1), 2.194(0.55), 2.437(0.55),

Physical Properties of Kraisslite

Cleavage:

{0001} Perfect

Color:

Copper brown, Dark copper brown.

Density:

3.876

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Compact - Occurs as a compact mass.

Habit:

Foliated - Two dimensional platy forms.

Habit:

Scaly - Morphology like fish scales.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Sub Metallic

Streak:

golden brown

Optical Properties of Kraisslite

Gladstone-Dale:

CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2059,KPDmeas= 0.2077,KC= 0.2031
Ncalc = 1.79

Optical Data:

Uniaxial (+), e=1.805.

Calculated Properties of Kraisslite

Electron Density:

Bulk Density (Electron Density)=3.71 gm/cc
note: Specific Gravity of Kraisslite =3.91 gm/cc.

Fermion Index:

Fermion Index = 0.0075795107
Boson Index = 0.9924204893

Photoelectric:

PE_Kraisslite= 22.53 barns/electron
U=PE_Kraisslite x rElectron Density= 83.62 barns/cc.

Radioactivity:

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

Kraisslite Classification

Dana Class:

43.04.10.01 (43)Compound Phosphates, etc.

(43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.04.10)Kraisslite Group

43.04.10.01 Kraisslite (Mn,Mg)24Zn3Fe(AsO3)2(AsO4)3(SiO4)6(OH)18 P 6₃22 6 2 2

43.04.10.02 Ekatite! (Fe,Fe,Zn)12(OH)6[AsO3]6[AsO3,HOSiO3]2 P 6₃mc 6mm

Strunz Class:

08.BE.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1

08.BE.45 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3

08.BE.45 Hematolite (Mn,Mg,Al)15(AsO3)(AsO4)2(OH)23 R 3 3

08.BE.45 Kraisslite (Mn,Mg)24Zn3Fe(AsO3)2(AsO4)3(SiO4)6(OH)18 P 6₃22 6 2 2

08.BE.45 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3c 3 2/m

08.BE.45 Turtmannite! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3c 3 2/m

08.BE.45 Arakiite! (Zn,Mn)(Mn,Mg)12(Fe,Al)2(AsO3)(AsO4)2(OH)23 Cc m

Other Kraisslite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Kraisslite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Kraisslite

(Mn++,Mg)24Zn3Fe+++(As+++O3)2(As+++++O4)3(SiO4)6(OH)18
Dana No: 43.04.10.01 Strunz No: 08.BE.45
Locality:

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