Arthurite Mineral Data +

Dan Weinrich Fine Minerals

General Arthurite Information
Chemical Formula:	CuFe+++2(AsO4,PO4,SO4)2(O,OH)2·4(H2O)
Composition:	Molecular Weight = 531.49 gm
	Iron        21.02 %  Fe   30.05 % Fe2O3
	Copper      11.96 %  Cu   13.46 % Cu2O
	Arsenic     19.74 %  As   30.27 % As2O5
	Phosphorus   2.33 %  P     5.34 % P2O5
	Hydrogen     1.61 %  H    14.41 % H2O
	Sulfur       1.21 %  S     3.01 % SO3
	Oxygen      42.14 %  O
	______        ______
	100.00 %       96.54 % = TOTAL OXIDE
Empirical Formula:	CuFe3+22(AsO4)0.72(PO4)0.22(SO4)0.1O1.5(OH)0.5·4(H2O)
Environment:	Secondary mineral in the oxidation zone of some copper deposits, formed by the alteration of arsenopyrite or enargite.
IMA Status:	Approved IMA 1964
Locality:	Hingston Down Consols mine, Calstock, Cornwall, England. Link to MinDat.org Location Data.
Name Origin:	Named for Sir Arthur Edward Ian Montagu Russell (1878-1964) and Arthur William Gerald Kingsbury (1906-1968) for their contributions to British mineralogy.
Synonym:	ICSD 100444
	PDF 36-400
Arthurite Image
Images:	Arthurite   Pharmacosiderite Comments: Altered rhyolite vug lined with brilliant apple green arthurite and cubic green crystals of pharmacosiderite. Location: Majuba Hill Mine, Pershing County, Nevada. USA. Scale: 2.7 x 1.7 cm. © John Veevaert
Images:	Arthurite Comments: Radiating sprays of acicular arthurite. Location: Majuba Hill mine, Pershing County, Nevada, USA. Scale: Spray size 2.5 mm. © Tom Loomis / Dakota Matrix
Arthurite Crystallography
Axial Ratios:	a:b:c =1.0488:1:0.5769
Cell Dimensions:	a = 10.09, b = 9.62, c = 5.55, Z = 2; beta = 92.2° V = 538.32 Den(Calc)= 3.28
Crystal System:	Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
X Ray Diffraction:	By Intensity(I/Io): 4.28(1), 4.81(1), 6.97(1),
Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A - Atoms On/Off P - Polyhedra On/Off B - Bonds On/Off Help on Above	Keller P , Hess H , Neues Jahrbuch fur Mineralogie, Abhandlungen , 133 (1978) p.291-302, Die kristallstruktur von arthurit, CuFe2[(H2O)4|(OH)2|(AsO4)2]
Physical Properties of Arthurite
Cleavage:	None
Color:	Apple green, Emerald green.
Density:	3.02
Diaphaniety:	Transparent
Fracture:	Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:	Acicular - Occurs as needle-like crystals.
Habit:	Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:	Spherical - Spherical, rounded aggregates.
Hardness:	3-4 - Calcite-Fluorite
Luster:	Vitreous (Glassy)
Streak:	light green
Optical Properties of Arthurite
Gladstone-Dale:	CI meas= -0.061 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2336,KPDmeas= 0.2538,KC= 0.2393
Optical Data:	Biaxial (+/-), a=1.736, b=1.767, g=1.796, bire=0.0600, 2V(Calc)=86, 2V(Meas)=~90.
Pleochroism (x):	colorless or pale green.
Pleochroism (y):	gray green.
Pleochroism (z):	olive green.
Calculated Properties of Arthurite
Electron Density:	relectron=3.17 gm/cc note: rArthurite =3.28 gm/cc.
Fermion Index	Fermion Index = 0.00475 Boson Index = 0.99525
Photoelectric:	PEArthurite = 25.00 barns/electron U=PEArthurite x relectron= 79.27 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Arthurite is Not Radioactive
Arthurite Classification
Dana Class:	42.11.18.2 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
	(42.11)where (AB)4 (XO4)3 Zq · x(H2O)
	(42.11.18)Dana Group
	42.11.18.1 Whitmoreite FeFe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
	42.11.18.2 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) P 21/c 2/m
	42.11.18.3 Ojuelaite ZnFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
	42.11.18.4 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
	42.11.18.5 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13·H2O P 21/n 2/m
	42.11.18.6 Cobaltarthurite! CoFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
Strunz Class:	VII/D.08-40 VII - Phosphates, Arsenates and Vanadates
	VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
	VII/D.08 - Arthurite group
	VII/D.08-10 Kleemanite ZnAl2(PO4)2(OH)2·3(H2O) P 2, P 21, P 2/m or P 21/m Mono
	VII/D.08-20 Whitmoreite FeFe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
	VII/D.08-30 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
	VII/D.08-40 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) P 21/c 2/m
	VII/D.08-45 Cobaltarthurite! CoFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
	VII/D.08-50 Ojuelaite ZnFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
	VII/D.08-60 Mapimite Zn2Fe3(AsO4)3(OH)4·10(H2O) Cm m
Other Arthurite Information
References:	NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
See Also:	Links to other databases for Arthurite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris Search for Arthurite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Arthurite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Arthurite Mineral Data : Ask about Arthurite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Arthurite Specimen Label here : Arthurite CuFe+++2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) Dana No: 42.11.18.2 Strunz No: VII/D.08-40 Locality:   Notes: