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Plumbotsumite

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Formula:
Pb13(CO3)6(Si10O27) · 3H2O
System:
Orthorhombic
Colour:
Colourless
Hardness:
2
New formula according to Cooper (pers. comm.), in Marty et al. (2010).
Originally given formula was Pb5Si4O8(OH)10.

Classification of Plumbotsumite

Approved
9.HH.20

9 : SILICATES (Germanates)
H : Unclassified silicates
H : With Pb
78.1.7.1

78 : Unclassified Silicates
1 : Miscellaneous
14.13.2

14 : Silicates not Containing Aluminum
13 : Silicates of Pb
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First Recorded Occurrence of Plumbotsumite

Year of Discovery:
1982

Physical Properties of Plumbotsumite

Diaphaneity (Transparency):
Transparent
Colour:
Colourless
Hardness (Mohs):
2

Crystallography of Plumbotsumite

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.87Å, b = 9.26Å, c = 29.36Å
Ratio:
a:b:c = 1.714 : 1 : 3.171
Unit Cell Volume:
V 4,314.63 ų (Calculated from Unit Cell)
Twinning:
V-shaped penetration twins.

Optical Data of Plumbotsumite

Type:
Biaxial (-)
RI values:
nα = 1.922 nβ = 1.933 nγ = 1.938
2V:
Measured: 32° , Calculated: 66°
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v strong

Chemical Properties of Plumbotsumite

Formula:
Pb13(CO3)6(Si10O27) · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Plumbotsumite to other Species

9.HH.05MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2
9.HH.10LuddeniteCu2Pb2Si5O14 · 4H2O
9.HH.15CreaseyitePb2Cu2Fe23+(Si4.67Al0.33)O15.33(OH)3 · H2O
9.HH.25MolybdophyllitePb8Mg9[Si10O28(OH)8|O2|(CO3)3] · H2O
14.13.1AlamositePb12[Si12O36]
14.13.3LuddeniteCu2Pb2Si5O14 · 4H2O
14.13.4MolybdophyllitePb8Mg9[Si10O28(OH)8|O2|(CO3)3] · H2O
14.13.5MargarosanitePb(Ca,Mn2+)2(Si3O9)
14.13.6GanomalitePb9Ca5Mn(Si2O7)4(SiO4)O
14.13.7KentrolitePb2Mn23+(Si2O7)O2
14.13.8BarysilitePb8Mn2+[Si2O7]3
14.13.9MelanotekitePb2Fe23+(Si2O7)O2
14.13.10CreaseyitePb2Cu2Fe23+(Si4.67Al0.33)O15.33(OH)3 · H2O

Other Names for Plumbotsumite

Name in Other Languages:

Other Information

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 Plumbotsumite

Reference List:
American Mineralogist (1982): 67: 1075-1076.

Chemie der Erde (1982) 41, 1.

Marty, J., Kampf, A. R., Housley, R. M., Mills, S. J. & Weiß, S.. (2010). Seltene neue Tellurmineralien aus Kalifornien, Utah, Arizona und New Mexiko (USA). Lapis, 35 (12), 42-51; 66.

Internet Links for Plumbotsumite

Localities for Plumbotsumite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
France
 
  • Burgundy
    • Saône-et-Loire
      • Saint-Léger-sous-Beuvray
        • Saint-Prix
Vincent Bourgoin collection.
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Chemie der Erde (1982) 41, 1
USA
 
  • Arizona
    • Pinal Co.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 332.
  • California
    • San Bernardino Co.
      • Baker
        • Otto Mountain
Collected by and in the collection of Brent Thorne.
EDS confirmed by Bob Housley.
Collected by and in the collection of Brent Thorne.
      • Soda Lake Mts
        • Baker
Collected by and in the collection of Brent Thorne. SEM EDS and XRD confirmed.; American Mineralogist, Volume 94, pages 1198–1204, 2009
Mineral and/or Locality  
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