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Mottramite

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Formula:
PbCu(VO4)(OH)
System:
Orthorhombic
Colour:
Grass-green, ...
Hardness:
3 - 3½
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

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
41.5.2.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
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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First Recorded Occurrence of Mottramite

Place of Conservation of First Recorded 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

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:
5.9 g/cm3 (Measured)    6.187 g/cm3 (Calculated)

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:
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°
Max Birefringence:
δ = 0.150
Image 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(VO4)(OH)
Essential elements:
All elements listed in formula:
Common Impurities:
Zn

Relationship of Mottramite to other Species

Series:
Forms a series with Descloizite (see here)
Forms a series with Duftite (see here)
Other Members of Group:
AdeliteCaMg(AsO4)(OH)
ArsendescloizitePbZn(AsO4)(OH)
AustiniteCaZn(AsO4)(OH)
ČechitePb(Fe2+,Mn2+)(VO4)(OH)
CobaltaustiniteCaCo(AsO4)(OH)
ConichalciteCaCu(AsO4)(OH)
DescloizitePb(Zn,Cu)(VO4)(OH)
DuftitePbCu(AsO4)(OH)
GabrielsonitePbFe(AsO4)(OH)
GottlobiteCaMg(VO4,AsO4)(OH)
HermannroseiteCaCu(PO4)(OH)
NickelaustiniteCa(Ni,Zn)(AsO4)(OH)
PyrobelonitePbMn2+(VO4)(OH)
TangeiteCaCu(VO4)(OH)
8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2
8.BH.10DurangiteNaAl(AsO4)F
8.BH.10IsokiteCaMg(PO4)F
8.BH.10LacroixiteNaAl(PO4)F
8.BH.10MaxwelliteNaFe3+(AsO4)F
8.BH.10PanasqueiraiteCaMg(PO4)(OH,F)
8.BH.10TilasiteCaMg(AsO4)F
8.BH.15DrugmanitePb(Fe3+,Al)2(PO4)2(OH)2
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3
8.BH.20PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
8.BH.20PerloffiteBa(Mn2+,Fe2+)2Fe23+(PO4)3(OH)3
8.BH.20JohntomaiteBaFe22+Fe23+(PO4)3(OH)3
8.BH.25Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4
8.BH.25Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4
8.BH.30CarminitePbFe23+(AsO4)2(OH)2
8.BH.30SewarditeCaFe23+(AsO4)2(OH)2
8.BH.35AdeliteCaMg(AsO4)(OH)
8.BH.35ArsendescloizitePbZn(AsO4)(OH)
8.BH.35AustiniteCaZn(AsO4)(OH)
8.BH.35CobaltaustiniteCaCo(AsO4)(OH)
8.BH.35ConichalciteCaCu(AsO4)(OH)
8.BH.35DuftitePbCu(AsO4)(OH)
8.BH.35GabrielsonitePbFe(AsO4)(OH)
8.BH.35NickelaustiniteCa(Ni,Zn)(AsO4)(OH)
8.BH.35TangeiteCaCu(VO4)(OH)
8.BH.35GottlobiteCaMg(VO4,AsO4)(OH)
8.BH.35HermannroseiteCaCu(PO4)(OH)
8.BH.40ČechitePb(Fe2+,Mn2+)(VO4)(OH)
8.BH.40DescloizitePb(Zn,Cu)(VO4)(OH)
8.BH.40PyrobelonitePbMn2+(VO4)(OH)
8.BH.45BayldonitePbCu3(AsO4)2(OH)2
8.BH.45VésigniéiteBaCu3(VO4)2(OH)2
8.BH.50PaganoiteNiBi(AsO4)O
8.BH.55JagoweriteBaAl2(PO4)2(OH)2
8.BH.60Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4
8.BH.65LeningraditePbCu3(VO4)2Cl
21.3.1SteigeriteAl(VO4) · 3H2O
21.3.2Alvanite(Zn,Ni)Al4(V5+O3)2(OH)12 · 2H2O
21.3.3MetaschoderiteAl2(PO4)(VO4) · 6H2O
21.3.4SchoderiteAl2(PO4)(VO4) · 8H2O
21.3.5SatpaeviteAl12V24+V65+O37 · 30H2O
21.3.6VanaliteNaAl8V10O38 · 30H2O
21.3.7Wakefieldite-(Ce)Ce(VO4)
21.3.7Wakefieldite-(Y)Y(VO4)
21.3.8ChervetitePb2(V2O7)
21.3.10DescloizitePb(Zn,Cu)(VO4)(OH)
21.3.11ClinobisvaniteBi(VO4)
21.3.11DreyeriteBi(VO4)
21.3.11PucheriteBi(VO4)
21.3.12SchumacheriteBi3(VO4)2O(OH)
21.3.13NamibiteCu(BiO)2(VO4)(OH)
21.3.14PottsiteHPbBi(VO4)2 · 2H2O
21.3.15Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)

Other Names for Mottramite

Name in Other Languages:
Italian:Vesbine
Simplified Chinese:羟钒铜铅石
Spanish:Mottramita
Traditional Chinese:羥釩銅鉛石

Other Information

Electrical:
Readily soluble in acids.
Health Risks:
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

Specimens:
The following Mottramite specimens are currently listed for sale on minfind.com.

Localities for Mottramite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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