Annabergite Mineral Data
General Annabergite Information
Chemical Formula:
Ni3(AsO4)2•8(H2O)
Composition:
Molecular Weight = 598.03 gm
Nickel 29.44 % Ni 41.48 % Ni2 O3
Arsenic 25.06 % As 38.43 % As2 O5
Hydrogen 2.70 % H 24.10 % H2 O
Oxygen 42.81 % O
______ ______
100.00 % 104.01 % = TOTAL OXIDE
Empirical Formula:
Ni3 (AsO4 )2 •8(H2 O)
IMA Status:
Valid Species (Pre-IMA) 1852
Locality:
Annaberg, Germany. Link to MinDat.org Location Data.
Name Origin:
Named after its locality.
Name Pronunciation:
Annabergite + Pronunciation
Synonym:
ICSD 81386
Nickel Bloom
PDF 35-568
Annabergite Image
Images:
Annabergite Crystallography
Axial Ratios:
a:b:c =0.7619:1:0.3536
Cell Dimensions:
a = 10.122, b = 13.284, c = 4.698, Z = 2; beta = 104.75° V = 610.88 Den(Calc)= 3.25
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
X Ray Diffraction:
By Intensity(I/Io ): 6.58(1), 2.98(0.3), 3.18(0.26),
Physical Properties of Annabergite
Cleavage:
{010} Perfect
Color:
Apple green, Greenish white, Gray, Yellow green, White.
Density:
3 - 3.1, Average = 3.05
Diaphaneity:
Transparent to Subtransparent to translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Pearly
Streak:
light green
Optical Properties of Annabergite
Gladstone-Dale:
CI meas = 0.245 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = 0.292 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2017,KPDmeas = 0.215,KC = 0.2848 Ncalc = 1.85 - 1.93
Optical Data:
Biaxial (-), a=1.622, b=1.658, g=1.687, bire=0.0650, 2V(Calc)=82, 2V(Meas)=84. Dispersion relatively weak.
Calculated Properties of Annabergite
Electron Density:
Bulk Density (Electron Density)=3.00 gm/cc note: Specific Gravity of Annabergite =3.05 gm/cc.
Fermion Index:
Fermion Index = 0.0035364165 Boson Index = 0.9964635835
Photoelectric:
PEAnnabergite = 28.21 barns/electronU=PEAnnabergite x r Electron Density= 84.59 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Annabergite is Not Radioactive
Annabergite Classification
Dana Class:
40.03.06.04 (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 Annabergite Information
References:
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Annabergite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Scandinavian mineral gallery
18 - WWW-MINCRYST
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Annabergite
Ni3(AsO4)2•8(H2O)
Dana No: 40.03.06.04 Strunz No: 08.CE.40
Locality:
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