Aerugite Mineral Data

Aerugite Mineral Data +

General Aerugite Information

Chemical Formula:

([ ],Ni)9(AsO4)2(AsO6) (?)

Composition:

Molecular Weight = 976.97 gm

Nickel 54.07 % Ni 68.81 % NiO

Arsenic 23.01 % As 30.38 % As₂O₃

Oxygen 22.93 % O

______ ______

100.00 % 99.18 % = TOTAL OXIDE

Empirical Formula:

Ni₉As₃O₁₄

Environment:

Found in the walls of furnaces used to roast ore.

IMA Status:

Valid Species (Pre-IMA) 1858

Locality:

South Terres mine, St Austell, Cornwall, England. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for 'copper rust', in allusion to its appearance.

Synonym:

ICSD 65630

PDF 18-873 mcl

Aerugite Image

Images:

Aerugite

Comments: Small dark green crystals of aerugite.
Location: Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Aerugite Crystallography

Axial Ratios:

a:c = 1:4.63249

Cell Dimensions:

a = 5.951, c = 27.568, Z = 3; V = 845.50 Den(Calc)= 5.76

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.06(1), 3.76(0.8), 2.329(0.6),

Crystal Structure:

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Fleet M E , Barbier J , Acta Crystallographica, Section B , 45 (1989) p.201-205, Structure of aerugite (Ni8.5As3O16) and interrelated, arsenate and germanate structural series

Physical Properties of Aerugite

Color:

Deep blue green, Green.

Density:

5.85 - 5.95, Average = 5.9

Diaphaniety:

Opaque

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4 - Fluorite

Magnetism:

Nonmagnetic

Streak:

greenish white

Optical Properties of Aerugite

Optical Data:

NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.1925) where Ncalc=Dcalc*KC+1
NCalc= 2.14 - from Gladstone-Dale relationship (KC = 0.1925) where Ncalc=Dmeas*KC+1

Calculated Properties of Aerugite

Electron Density:

r_electron=5.46 gm/cc
note: r_Aerugite=5.76 gm/cc.

Fermion Index

Fermion Index = 0.00621
Boson Index = 0.99379

Photoelectric:

PE_Aerugite= 37.82 barns/electron
U=PE_Aerugite x r_electron= 206.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Aerugite is Not Radioactive

Aerugite Classification

Dana Class:

38.5.10.1 (38)Anhydrous Phosphates, etc

(38.5)with miscellaneous formulae

(38.5.10)Dana Group

38.5.10.1 Aerugite ([],Ni)9(AsO4)2(AsO6)(?) R 3m 3 2/m

Strunz Class:

VII/B.09-10 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.09 - Aerugite - Aangelellite series

VII/B.09-10 Aerugite ([],Ni)9(AsO4)2(AsO6)(?) R 3m 3 2/m

VII/B.09-15 Grattarolaite! Fe3O3(PO4) R 3m 3m

VII/B.09-20 Angelellite Fe4(AsO4)2O3 P1 1

Other Aerugite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

See Also:

Links to other databases for Aerugite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Aerugite

([ ],Ni)9(AsO4)2(AsO6) (?)
Dana No: 38.5.10.1 Strunz No: VII/B.09-10
Locality:

Notes: