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 % Fe2 O3
Arsenic 38.90 % As 59.67 % As2 O5
Hydrogen 2.97 % H 26.51 % H2 O
Oxygen 48.46 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Fe3+ 3(H2 )3(AsO4 )•5.5(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEKaatialaite = 28.79 barns/electronU=PEKaatialaite x r Electron 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
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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:
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