Mottramite Mineral Data +

Greenside Minerals

General Mottramite Information
Chemical Formula:	PbCu(VO4)(OH)
Composition:	Molecular Weight = 402.69 gm
	Vanadium  12.65 %  V    22.58 % V2O5
	Copper    15.78 %  Cu   19.75 % CuO
	Hydrogen   0.25 %  H     2.24 % H2O
	Lead      51.45 %  Pb   55.43 % PbO
	Oxygen    19.87 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	PbCu(VO4)(OH)
IMA Status:	Valid Species (Pre-IMA) 1876
Locality:	Mottram, St. Andrews, Cheshire, England. Link to MinDat.org Location Data.
Name Origin:	Named for the locality.
Synonym:	Cuprodescloizite
	Duhamelite
	ICSD 72457
	IMA2001-B
	PDF 43-1463
Mottramite Image
Images:	Mottramite   Beaverite Comments: Specimen of quartz with a thick druse of green mottramite (cuprodescloizite) crystals and a scattered grouping of micro beaverite crystals (lemon yellow in color). Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 3.3 x 2.5 cm. © John Veevaert
Images:	Mottramite Comments: Botryoidal green mottramite on white calcite. Location: Tsumeb Mine,Tsumeb, Namibia. Scale: 7.5 cm by 8 cm. © Kevin Ward
Mottramite Crystallography
Axial Ratios:	a:b:c =0.8262:1:0.6472
Cell Dimensions:	a = 7.685, b = 9.301, c = 6.02, Z = 4; V = 430.30 Den(Calc)= 6.22
Crystal System:	Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam
X Ray Diffraction:	By Intensity(I/Io): 3.24(1), 2.87(0.8), 5.07(0.8),
Physical Properties of Mottramite
Cleavage:	None
Color:	Brown, Brown red, Brownish black, Green, Dark green.
Density:	5.9 - 6, Average = 5.95
Diaphaniety:	Transparent to Opaque
Fracture:	Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:	Encrustations - Forms crust-like aggregates on matrix.
Habit:	Plumose - "Mica-like" minerals forming aggregates of plume-like forms.
Habit:	Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:	3.5 - Copper Penny
Luster:	Greasy (Oily)
Streak:	light brownish green
Optical Properties of Mottramite
Gladstone-Dale:	CI meas= -0.125 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.076 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2063,KPDmeas= 0.2157,KC= 0.1917
Optical Data:	Biaxial (-), a=2.21, b=2.31, g=2.33, bire=0.1200, 2V(Calc)=46, 2V(Meas)=73.
Calculated Properties of Mottramite
Electron Density:	relectron=5.41 gm/cc note: rMottramite =6.22 gm/cc.
Fermion Index	Fermion Index = 0.11412 Boson Index = 0.88588
Photoelectric:	PEMottramite = 919.10 barns/electron U=PEMottramite x relectron=4,968.74 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mottramite is Not Radioactive
Mottramite Classification
Dana Class:	41.5.2.2 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
	(41.5)where (A B)2 (XO4) Zq
	(41.5.2)Dana Group
	41.5.2.1 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
	41.5.2.2 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m
	41.5.2.3 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
	41.5.2.4 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
	41.5.2.5 Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
Strunz Class:	VII/B.27-30 VII - Phosphates, Arsenates and Vanadates
	VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
	VII/B.27 - Descloizite group
	VII/B.27-10 Arsendescloizite PbZn(AsO4)(OH) P 212121 2 2 2
	VII/B.27-20 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
	VII/B.27-30 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m
	VII/B.27-40 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
	VII/B.27-50 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
Other Mottramite Information
References:	NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)
See Also:	Links to other databases for Mottramite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - EUROmin Project 6 - Glendale Community College 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 - YupRocks 17 -École des Mines de Paris Search for Mottramite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Mottramite : 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 Mottramite Mineral Data : Ask about Mottramite 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 Mottramite Specimen Label here : Mottramite PbCu(VO4)(OH) Dana No: 41.5.2.2 Strunz No: VII/B.27-30 Locality:   Notes: