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Mottramite

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Formula:
PbCu(VO
 
4
)(OH)
System:OrthorhombicColour:Grass-green, ...
Hardness:3 - 3½
Member of:Adelite-Descloizite Group
Name:For the locality at Mottram St. Andrew, Cheshire, England where ore was stockpiled. Most likely mined from Pim Hill Mine, Shrewsbury, Shropshire.


Adelite-Descloizite Group. Descloizite-Mottramite Series. Duftite-Mottramite Series.
The copper analogue of Descloizite.

A secondary mineral frequently found principally in the oxidized zones of ore deposits.

Classification of Mottramite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/B.27-30
Nickel-Strunz 10th (pending) edition ID:8.BH.40

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
Dana 8th edition ID:41.5.2.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:21.3.9

21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi
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Type Occurrence of Mottramite

Type Locality:Mottram St Andrew, Cheshire, England, UK
Place of Conservation of Type Material:Natural History Museum London 52314-52315
Year of Discovery:1876

Occurrences of Mottramite

Geological Setting:Oxidation zone of vanadium bearing base metal deposits.

Physical Properties of Mottramite

Lustre:Greasy
Diaphaneity (Transparency):Transparent, Opaque
Colour:Grass-green, olive-green, yellow-green, siskin-green, blackish brown, nearly black
Comment:Crystals often exhibit zonal growth with varying colours.
Streak:Yellowish green
Hardness (Mohs):3 - 3½
Comment:Hardness somewhat harder on crystal surfaces.
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):5.9 g/cm3
Density (calculated):6.187 g/cm3

Crystallography of Mottramite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma
Cell Parameters:a = 7.68Å, b = 9.27Å, c = 6.03Å
Ratio:a:b:c = 0.828 : 1 : 0.65
Unit Cell Volume:V 429.30 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals equant, dipyramidal {111}, prismatic [001]. Drusy crusts of intergrown crystals common; mammillary or botryoidal surfaces.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Mottramite

Type:Biaxial (-)
RI values: nα = 2.170(2) nβ = 2.260(2) nγ = 2.320(2)
2V:Measured: 73° , Calculated: 46°
Maximum Birefringence:δ = 0.150

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:strong r > v rarely r < v
Pleochroism:Visible
Comments:Weak to strong
X=Y= canary yellow to greenish yellow
Z= brownish yellow

Chemical Properties of Mottramite

Formula:
PbCu(VO
 
4
)(OH)
Simplified for copy/paste:PbCu(VO4)(OH)
Essential elements:Cu, H, O, Pb, V
All elements listed in formula:Cu, H, O, Pb, V
Common Impurities:Zn

Relationship of Mottramite to other Species

Series:Forms a series with Descloizite (see here)
Forms a series with Duftite (see here)
Member of:Adelite-Descloizite Group
Other Members of Group:

- +
Adelite
CaMg(AsO
 
4
)(OH)
Arsendescloizite
PbZn(AsO
 
4
)(OH)
Austinite
CaZn(AsO
 
4
)(OH)
Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
Cobaltaustinite
CaCo(AsO
 
4
)(OH)
Conichalcite
CaCu(AsO
 
4
)(OH)
Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
Duftite
PbCu(AsO
 
4
)(OH)
Gabrielsonite
PbFe(AsO
 
4
)(OH)
Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
Hermannroseite
CaCu(PO
 
4
)(OH)
Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
Tangeite
CaCu(VO
 
4
)(OH)
Common Associates:
VanadinitePyromorphiteMimetiteDescloiziteCerussite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BH.05Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,F)
 
2
8.BH.10Durangite
NaAl(AsO
 
4
)F
8.BH.10Isokite
CaMg(PO
 
4
)F
8.BH.10Lacroixite
NaAl(PO
 
4
)F
8.BH.10Maxwellite
NaFe
3+
 
(AsO
 
4
)F
8.BH.10Panasqueiraite
CaMg(PO
 
4
)(OH,F)
8.BH.10Tilasite
CaMg(AsO
 
4
)F
8.BH.15Drugmanite
Pb(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.20Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Cirrolite
Ca
 
3
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
(?)
8.BH.20Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Penikisite
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Johntomaite
BaFe
2+
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.25Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
4
(OH,F)
 
4
8.BH.25Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
(PO
 
4
)
 
4
(OH)
 
4
8.BH.30Carminite
PbFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.30Sewardite
CaFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.35Adelite
CaMg(AsO
 
4
)(OH)
8.BH.35Arsendescloizite
PbZn(AsO
 
4
)(OH)
8.BH.35Austinite
CaZn(AsO
 
4
)(OH)
8.BH.35Cobaltaustinite
CaCo(AsO
 
4
)(OH)
8.BH.35Conichalcite
CaCu(AsO
 
4
)(OH)
8.BH.35Duftite
PbCu(AsO
 
4
)(OH)
8.BH.35Gabrielsonite
PbFe(AsO
 
4
)(OH)
8.BH.35Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
8.BH.35Tangeite
CaCu(VO
 
4
)(OH)
8.BH.35Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
8.BH.35Hermannroseite
CaCu(PO
 
4
)(OH)
8.BH.40Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
8.BH.40Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
8.BH.40Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
8.BH.45Bayldonite
PbCu
 
3
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.45Vésigniéite
BaCu
 
3
(VO
 
4
)
 
2
(OH)
 
2
8.BH.50Paganoite
NiBi(AsO
 
4
)O
8.BH.55Jagowerite
BaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.60Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
(HPO
 
4
,PO
 
4
)
 
3
(SiO
 
4
,PO
 
4
)(OH)
 
4
8.BH.65Leningradite
PbCu
 
3
(VO
 
4
)
 
2
Cl
Related Minerals - Hey's Index Grouping:

- +
21.3.1Steigerite
Al(VO
 
4
) · 3H
 
2
O
21.3.2Alvanite
(Zn,Ni)Al
 
4
(V
5+
 
O
 
3
)
 
2
(OH)
 
12
· 2H
 
2
O
21.3.3Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
21.3.4Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
21.3.5Satpaevite
Al
 
12
V
4+
2
V
5+
6
O
 
37
· 30H
 
2
O
21.3.6Vanalite
NaAl
 
8
V
 
10
O
 
38
· 30H
 
2
O
21.3.7Wakefieldite-(Ce)
Ce(VO
 
4
)
21.3.7Wakefieldite-(Y)
Y(VO
 
4
)
21.3.8Chervetite
Pb
 
2
(V
 
2
O
 
7
)
21.3.10Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
21.3.11Clinobisvanite
Bi(VO
 
4
)
21.3.11Dreyerite
Bi(VO
 
4
)
21.3.11Pucherite
Bi(VO
 
4
)
21.3.12Schumacherite
Bi
 
3
(VO
 
4
)
 
2
O(OH)
21.3.13Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
21.3.14Pottsite
HPbBi(VO
 
4
)
 
2
· 2H
 
2
O
21.3.15Duhamelite
(Pb,Bi,Ca)Cu(VO
 
4
)(OH,O)

Other Names for Mottramite

Synonyms:
α-DuftiteChileiteCuprovanaditeDuftite-αPsittacinite
Other Languages:
German:Mottramit
Vesbin
Italian:Vesbine
Russian:Моттрамит
Simplified Chinese:羟钒铜铅石
Spanish:Mottramita
Traditional Chinese:羥釩銅鉛石
Varieties:
Duhamelite

Other Information

Electrical:Readily soluble in acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Mottramite

Reference List:

- +
Domeyko (1848) Annales des mines: 14: 145 (as Chileite).

Adam, M. (1869) Tableau minéralogique, Paris: 33 (as Cuprovanadite).

Genth (1876) Proceedings of the American Philosophical Society: 14: 229 (as Psittacinite).

Roscoe (1876) Proceedings of the Royal Society of London: 25: 111.

Scacchi (1879) Acc. Napoli, Att.: 8: 1 (as Vesbine).

Wells (1913) American Journal of Science: 36: 636.

Goldschmidt, V. (1916) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 3: 32.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 67, 64.

Zambonini and Carobbi (1927) American Mineralogist: 12: 1 (Vesbine).

Diefenbach (1930) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 74: 155.

Dittler and Hueber (1931) Mineralogische und petrographische Mitteilungen, Vienna: 41: 173.

Hintze, Carl (1931) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4A]: 666.

Bannister (1933) Mineralogical Magazine: 23: 376.

Meixner (1937) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 79.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 811-816.

Mineralogical Magazine (1986): 50: 137.

Canadian Mineralogist (1995): 33: 1119-1124.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 392.

Internet Links for Mottramite

Search Engines:
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  • External Links:
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  • Look for Mottramite on Wikipedia
  • Look for Mottramite on Mineralien Atlas[Link Broken?]
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mottramite details from Handbook of Mineralogy (PDF)
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    Localities for Mottramite

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