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Alamosite

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Formula:
PbSiO3
Also given as Pb12(Si12O36).
Colour:
Colorless to white, cream, or light gray
Lustre:
Adamantine
Hardness:
Crystal System:
Monoclinic
Name:
Named after its discovery locality at Alamos, Mun. de Alamos, Sonora, Mexico.
This page provides mineralogical data about Alamosite.


Hide all sections | Show all sections

Classification of AlamositeHide

Approved, 'Grandfathered' (first described prior to 1959)
9.DO.20

9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
65.7.1.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
7 : Single-Width Unbranched Chains, W=1 with chains P > 7
14.13.1

14 : Silicates not Containing Aluminum
13 : Silicates of Pb

Physical Properties of AlamositeHide

Adamantine
Transparency:
Transparent, Translucent
Colour:
Colorless to white, cream, or light gray
Streak:
white
Hardness:
4½ on Mohs scale
Cleavage:
Perfect
{010}

Optical Data of AlamositeHide

Type:
Biaxial (-)
RI values:
nα = 1.947 nβ = 1.961 nγ = 1.968
2V:
Measured: 65° , Calculated: 70°
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively weak

Chemical Properties of AlamositeHide

Formula:
PbSiO3

Also given as Pb12(Si12O36).
IMA Formula:
PbSiO3
Common Impurities:
Al,Fe,Mn,Ca

Crystallography of AlamositeHide

Crystal System:
Monoclinic
Cell Parameters:
a = 12.24 Å, b = 7.05 Å, c = 11.23 Å
β = 113.12°
Ratio:
a:b:c = 1.736 : 1 : 1.593
Unit Cell V:
891.23 ų (Calculated from Unit Cell)
Morphology:
Crystals fibrous parallel [010] ; as radiating aggregates and balls, to 7.5 cm.

Type Occurrence of AlamositeHide

Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA, 84859, 85509.
Associated Minerals at Type Locality:

Other Language Names for AlamositeHide

German:Alamosit
Spanish:Alamosita

Common AssociatesHide

AnglesitePbSO4
CerussitePbCO3
DiaboleitePb2CuCl2(OH)4
HematiteFe2O3
KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
LeadhillitePb4(CO3)2(SO4)(OH)2
MelanotekitePb2Fe3+2(Si2O7)O2
MelanotekitePb2Fe3+2(Si2O7)O2
PhosgenitePb2CO3Cl2
ShattuckiteCu5(Si2O6)2(OH)2
WickenburgiteCaPb3Al2Si10O24(OH)6
WillemiteZn2SiO4
WulfenitePb(MoO4)
Associated Minerals Based on Photo Data:
Melanotekite10 photos of Alamosite associated with Melanotekite on mindat.org.
Leadhillite4 photos of Alamosite associated with Leadhillite on mindat.org.
Kegelite4 photos of Alamosite associated with Kegelite on mindat.org.
Willemite2 photos of Alamosite associated with Willemite on mindat.org.
Hematite2 photos of Alamosite associated with Hematite on mindat.org.
Ca-bearing Queitite2 photos of Alamosite associated with Ca-bearing Queitite on mindat.org.
Ganomalite2 photos of Alamosite associated with Ganomalite on mindat.org.
Quartz2 photos of Alamosite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DO.05Pyroxferroite(Fe,Mn,Ca)SiO3Tric.
9.DO.05PyroxmangiteMnSiO3Tric. 1
9.DO.10PellyiteBa2Ca(Fe,Mg)2Si6O17Orth.
9.DO.15Nordite-(Ce)(Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
9.DO.15Nordite-(La)(La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
9.DO.15Ferronordite-(Ce)Na3SrCeFe2+Si6O17Orth.
9.DO.15Manganonordite-(Ce)Na3SrCeMn2+Si6O17Orth.
9.DO.15Ferronordite-(La)Na3Sr(La,Ce)FeSi6O17
9.DO.25LiebauiteCa3Cu5Si9O26Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.13.2PlumbotsumitePb13(CO3)6(Si10O27) · 3H2OOrth.
14.13.3LuddeniteCu2Pb2Si5O14 · 4H2OMon.
14.13.4MolybdophyllitePb8Mg9[Si10O28(OH)8|O2|(CO3)3] · H2O Mon. 2 : B2
14.13.5MargarosanitePb(Ca,Mn2+)2(Si3O9)Tric. 1 : P1
14.13.6GanomalitePb9Ca5Mn(Si2O7)4(SiO4)OHex.
14.13.7KentrolitePb2Mn3+2(Si2O7)O2Orth. mmm (2/m 2/m 2/m) : Pbcm
14.13.8BarysilitePb8Mn2+[Si2O7]3Trig.
14.13.9MelanotekitePb2Fe3+2(Si2O7)O2Orth.
14.13.10CreaseyitePb2Cu2Fe3+2(Si4.67Al0.33)O15.33(OH)3 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Other InformationHide

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 AlamositeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Palache, C., Merwin, H.E. (1909) Alamosite, a new lead silicate from Mexico. American Journal of Science: 27: 399-401.
Boucher, M.L., Donald, P.R. (1968) The crystal structure of alamosite, PbSiO3. Zeitschrift für Kristallographie: 126: 98-111.
Krivovichev, S.V., Burns, P.C. (2004) Crystal structure of synthetic alamosite Pb[SiO3]. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 133(5): 70-76.

Internet Links for AlamositeHide

Localities for AlamositeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Mexico
 
  • Hidalgo
    • Mun. de Zimapán
      • Zimapán
Panczner, W. D. (1987): Minerals of Mexico. Van Nostrand Reinhold, New York, 459 pp, p.87.
  • Sonora
    • Mun. de Álamos
[Amer.J.Sci., ser. 4 (1909) 27, 399; Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
Norway
 
  • Oppland
    • Lunner
      • Grua
        • Grua Mining District
Folvik, H. O. (2013): Alamositt fra Skjerpemyr, Grua, Oppland. Stein. 40 (1), 13
Sweden
 
  • Värmland
    • Filipstad
Nysten, P. (1994): Mineralogiska notiser 3: Alamosit, Långban. Långbansnytt. 10.[ reprinted in: Långbansnytt. De första 20 åren 1983-2003. Långbansällskapet - Skrifter och rapporter. 2, 44]; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
      • Nordmark district
        • Jakobsberg ore field
Nysten, P. (1994): Mineralogiska notiser 3: Alamosit, Långban. Långbansnytt. 10.[ reprinted in: Långbansnytt. De första 20 åren 1983-2003. Långbansällskapet - Skrifter och rapporter. 2, 44]
      • Persberg district
        • Pajsberg
http://www.geonord.se/langban/LBS_web/Harstigen.htm
Tajikistan
 
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Agakhanov, A.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., Karpenko, V.Yu., Siidra, O.I., Muftakhov, V.A. (2016): Odigitriaite, CsNa5Ca5[Si14B2O38]F2, a new cesium borosilicate mineral from the Darai-Pioz alkaline massif, Tajikistan: Description and crystal structure. Mineralogical Magazine, 80, (in press).
USA
 
  • Arizona
    • Cochise Co.
      • Tombstone Hills
        • Tombstone District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 104, 242.
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
              • Tiger Wash
Raman analyzed at the University of Arizona.
    • Mohave Co.
      • Artillery Mts
        • Artillery Peak
S. A. Williams (1982) Luddenite, a New Copper-Lead Silicate from Arizona Mineralogical Magazine 1982 46 : 363-364
        • Rawhide Wash
http://www.mindat.org/mesg-7-84077.html
          • Rawhide Mine area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 104, 369; Williams, S.A. (1982), Luddenite, a new copper-lead silicate mineral from AZ, Mineralogical Magazine: 46:363-364.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 280.
    • Pinal Co.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Analyzed at the University of Western Syndey, Australia.
Mineral and/or Locality  
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