Ferrarisite Mineral Data
General Ferrarisite Information
Chemical Formula:
Ca5(AsO3OH)2(AsO4)2•9(H2O)
Composition:
Molecular Weight = 920.22 gm
Calcium 21.78 % Ca 30.47 % CaO
Arsenic 32.57 % As 49.95 % As2 O5
Hydrogen 2.19 % H 19.58 % H2 O
Oxygen 43.47 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca5 (AsO3 OH)2 (AsO4 )2 •9(H2 O)
Environment:
Post-mine low-temperature reaction product of carbonate gangue with arsenical solutions derived from arsenic
IMA Status:
Approved IMA 1980
Locality:
Gabe-Gottes mine, Rauenthal, near Sainte-Marie-aux-Mines, France. Link to MinDat.org Location Data.
Name Origin:
Named for Giovanni Ferraris (1937- ), Institute of Mineralogy, Crystallography and Geochemistry, University of Turin, Turin, Italy.
Name Pronunciation:
Ferrarisite + Pronunciation
Synonym:
ICSD 200781
PDF 33-280
Ferrarisite Image
Images:
Ferrarisite Crystallography
Axial Ratios:
a:b:c =1.2338:1:1.6658
Cell Dimensions:
a = 8.294, b = 6.722, c = 11.198, Z = 1; alpha = 106.16°, beta = 92.94°, gamma = 99.2° V = 591.15 Den(Calc)= 2.58
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 10.81(1), 10.84(1), 2.831(0.9),
Physical Properties of Ferrarisite
Cleavage:
{001} Perfect
Color:
Colorless, White.
Density:
2.63
Diaphaneity:
Transparent
Streak:
white
Optical Properties of Ferrarisite
Gladstone-Dale:
CI meas = -0.03 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = -0.046 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2212,KPDmeas = 0.2179,KC = 0.2115 Ncalc = 1.55 - 1.56
Optical Data:
Biaxial (+), a=1.562, b=1.572, g=1.585, bire=0.0230, 2V(Calc)=84, 2V(Meas)=83.
Calculated Properties of Ferrarisite
Electron Density:
Bulk Density (Electron Density)=2.58 gm/cc note: Specific Gravity of Ferrarisite =2.63 gm/cc.
Fermion Index:
Fermion Index = 0.000505904 Boson Index = 0.999494096
Photoelectric:
PEFerrarisite = 24.25 barns/electronU=PEFerrarisite x r Electron Density= 62.65 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ferrarisite is Not Radioactive
Ferrarisite Classification
Dana Class:
39.02.03.01 (39) Hydrated Acid Phosphates, etc
(39.02) H2 (AB)5 (XO4)4 � x(H2O)
(39.02.03) Dana Group
39.02.03.01 Ferrarisite Ca5(AsO3OH)2(AsO4)2•9(H2O) P1 1
Strunz Class:
08.CJ.30 08 - PHOSPHATES, ARSENATES, VANADATES
08.C - Phosphates without Additional Anions, with H2O
08.CJ -With only large cations
08.CJ.30 Ferrarisite Ca5(AsO3OH)2(AsO4)2•9(H2O) P1 1
Other Ferrarisite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Ferrarisite :
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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Ferrarisite Specimen Label here :
Ferrarisite
Ca5(AsO3OH)2(AsO4)2•9(H2O)
Dana No: 39.02.03.01 Strunz No: 08.CJ.30
Locality:
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