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Plumbotsumite

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Formula:
Pb5Si4O8(OH)10
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

Physical Properties of Plumbotsumite

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

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

IMA Formula:
Pb5Si4O8(OH)10
Elements listed in formula:

Crystallography of Plumbotsumite

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.87 Å, b = 9.26 Å, c = 29.36 Å
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.

Type Occurrence of Plumbotsumite

Relationship of Plumbotsumite to other Species

9.HH.05MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2
9.HH.10LuddeniteCu2Pb2Si5O14 · 14H2O
9.HH.15CreaseyiteCu2Pb2Fe23+Si5O17 · 6H2O
9.HH.25MolybdophyllitePb8Mg9[Si10O30(OH)8(CO3)3] · H2O
14.13.1AlamositePbSiO3
14.13.3LuddeniteCu2Pb2Si5O14 · 14H2O
14.13.4MolybdophyllitePb8Mg9[Si10O30(OH)8(CO3)3] · H2O
14.13.5MargarosaniteCa2PbSi3O9
14.13.6GanomalitePb3Ca2(SiO4)(Si2O7)
14.13.7KentrolitePb2Mn23+O2(Si2O7)
14.13.8BarysilitePb8Mn(Si2O7)3
14.13.9MelanotekitePb2Fe23+O2Si2O7
14.13.10CreaseyiteCu2Pb2Fe23+Si5O17 · 6H2O

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

mindat.org URL:
https://www.mindat.org/min-3230.html
Please feel free to link to this page.

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
 
  • Bourgogne-Franche-Comté
    • Saône-et-Loire
      • Saint-Léger-sous-Beuvray
        • Saint-Prix
Vincent Bourgoin collection.
Namibia (TL)
 
  • 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.
      • Silver Lake District
        • Soda Mts
          • Baker
            • Otto Mountain
Collected by and in the collection of Brent Thorne.
Collected by and in the collection of Brent Thorne. EDS confirmed by Bob Housley.
Collected by and in the collection of Brent Thorne.
Collected by and in the collection of Brent Thorne.
          • Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort)
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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