Annabergite Mineral Data

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General Annabergite Information

Chemical Formula:

Ni3(AsO4)2•8(H2O)

Composition:

Molecular Weight = 598.03 gm

Nickel 29.44 % Ni 41.48 % Ni₂O₃

Arsenic 25.06 % As 38.43 % As₂O₅

Hydrogen 2.70 % H 24.10 % H₂O

Oxygen 42.81 % O

______ ______

100.00 % 104.01 % = TOTAL OXIDE

Empirical Formula:

Ni₃(AsO₄)₂•8(H₂O)

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

Comments: Green spray of annabergite crystals.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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 - PrismaticH-M Symbol (2/m) Space Group: I2/m

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

By Intensity(I/I_o): 6.58(1), 2.98(0.3), 3.18(0.26),

Crystal Structure:

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Wildner M , Giester G , Lengauer C L , McCammon C A , European Journal of Mineralogy , 8 (1996) p.187-192, Structure and crystal chemistry of vivianite-type compounds: Crystal, structures of erythrite and annabergite with a Mossbauer study of erythrite

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:

PE_Annabergite= 28.21 barns/electron
U=PE_Annabergite x rElectron 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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Scandinavian mineral gallery
18 - WWW-MINCRYST

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

Annabergite

Ni3(AsO4)2•8(H2O)
Dana No: 40.03.06.04 Strunz No: 08.CE.40
Locality:

Notes: