Kaatialaite Mineral Data

General Kaatialaite Information

Chemical Formula:

Fe+++[H2As+++++O4]3•5-5.5(H2O)

Composition:

Molecular Weight = 577.74 gm

Iron 9.67 % Fe 13.82 % Fe₂O₃

Arsenic 38.90 % As 59.67 % As₂O₅

Hydrogen 2.97 % H 26.51 % H₂O

Oxygen 48.46 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺3(H₂)3(AsO₄)•5.5(H₂O)

IMA Status:

Approved IMA 1984

Locality:

Kaatiala granite pegmatite, Kuortane, western Finland. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Kaatialaite + Pronunciation

Synonym:

ICSD 15550

PDF 43-681

Kaatialaite Image

Images:

Kaatialaite

Comments: White kaatialaite with arsenolite on native arsenic.
Location: Shaft 371, Schlema-Hartenstein area, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Kaatialaite Crystallography

Axial Ratios:

a:b:c =0.7747:1:0.24

Cell Dimensions:

a = 15.34, b = 19.8, c = 4.752, Z = 4; beta = 91.9° V = 1,442.54 Den(Calc)= 2.66

Crystal System:

Monoclinic Space Group: P 2₁,P 2₁/m

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

By Intensity(I/I_o): 8.35(1), 9.91(0.6), 7.72(0.5),

Physical Properties of Kaatialaite

Color:

Greenish blue, Gray, Yellow, White.

Density:

2.64

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Streak:

white

Optical Properties of Kaatialaite

Gladstone-Dale:

CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2234,KPDmeas= 0.2251,KC= 0.2303
Ncalc = 1.61

Optical Data:

Biaxial (+), a=1.573, b=1.574, g=1.636, bire=0.0630, 2V(Calc)=16, 2V(Meas)=15.

Calculated Properties of Kaatialaite

Electron Density:

Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Kaatialaite =2.64 gm/cc.

Fermion Index:

Fermion Index = 0.0022863747
Boson Index = 0.9977136253

Photoelectric:

PE_Kaatialaite= 28.79 barns/electron
U=PE_Kaatialaite x rElectron Density= 74.19 barns/cc.

Radioactivity:

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

Kaatialaite Classification

Dana Class:

39.03.09.01 (39)Hydrated Acid Phosphates, etc

(39.03)with miscellaneous formulae

(39.03.09)Dana Group

39.03.09.01 Kaatialaite Fe[H2AsO4]3•5-5.5(H2O) P 2₁,P 2₁/m Mono

Strunz Class:

08.CC.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CC -With only medium-sized cations, RO4:H2O = 1:1.5

08.CC.10 Kaatialaite Fe[H2AsO4]3•5-5.5(H2O) P 2₁,P 2₁/m Mono

Other Kaatialaite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Kaatialaite :
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 Kaatialaite using:

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

Visit our Advertisers for Kaatialaite :

Ask about Kaatialaite 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 Español

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

Kaatialaite

Fe+++[H2As+++++O4]3•5-5.5(H2O)
Dana No: 39.03.09.01 Strunz No: 08.CC.10
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.