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Barysilite

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Formula:
Pb8Mn2+[Si2O7]3
System:
Trigonal
Colour:
White
Hardness:
3
Name:
Named in 1888 by Stens Anders Hjalmar Sjögren and Carl Herman Lundström from the Greek βαρυζ for "heavy" in allusion to its density and λιθοζ for its containing SILicon.
This page provides mineralogical data about Barysilite.

Classification of Barysilite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.BC.20

9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination
55.2.3.1

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination
14.13.8

14 : Silicates not Containing Aluminum
13 : Silicates of Pb
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Type Occurrence of Barysilite

Year of Discovery:
1888

Physical Properties of Barysilite

Colour:
White
Hardness (Mohs):
3

Crystallography of Barysilite

Crystal System:
Trigonal
Cell Parameters:
a = 9.8Å, c = 38.35Å
Ratio:
a:c = 1 : 3.913
Unit Cell Volume:
V 3,189.69 ų (Calculated from Unit Cell)
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 Barysilite

Type:
Uniaxial (-)
RI values:
nω = 2.033 nε = 2.015
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Barysilite

Formula:
Pb8Mn2+[Si2O7]3
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Fe,Zn,Mg,Ca

Relationship of Barysilite to other Species

9.BC.05GittinsiteCaZrSi2O7
9.BC.05Keiviite-(Y)(Y,Yb)2[Si2O7]
9.BC.05Keiviite-(Yb)(Yb,Y)2Si2O7
9.BC.05Thortveitite(Sc,Y)2Si2O7
9.BC.05Yttrialite-(Y)(Y,Th)2Si2O7
9.BC.10Keldyshite(Na,H)2ZrSi2O7
9.BC.10KhibinskiteK2ZrSi2O7
9.BC.10ParakeldyshiteNa2ZrSi2O7
9.BC.15RankiniteCa3Si2O7
9.BC.25Edgarbaileyite(Hg-Hg)3Si2O7
9.BC.30KristianseniteCa2ScSn(Si2O7)(Si2O6OH)
9.BC.35Percleveite-(Ce)(Ce,La,Nd)2Si2O7
14.13.1AlamositePb12[Si12O36]
14.13.2PlumbotsumitePb13(CO3)6(Si10O27) · 3H2O
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
14.13.9MelanotekitePb2Fe23+(Si2O7)O2
14.13.10CreaseyitePb2Cu2Fe23+(Si4.67Al0.33)O15.33(OH)3 · H2O

Other Names for Barysilite

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 Barysilite

Reference List:
American Mineralogist (1969): 54: 510-521.

Acta Crystallographica: 20: 357-363.

Kolitsch, U. and Holtstam, D. (2002) Barysilite from Garpenberg Norra, Dalarna, Sweden: occurrence and crystal structure refinement. Mineralogical Magazine: 66: 353-363.

Internet Links for Barysilite

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

Localities for Barysilite

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.
Germany
 
  • Lower Saxony
    • Harz
      • Clausthal-Zellerfeld
        • Bockswies veins
          • Oberschulenberg
No reference listed
Namibia
 
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
Sweden
 
  • Dalarna
    • Hedemora
      • Garpenberg
U. Kolitsch and D. Holtstam (2002): Barysilite from Garpenberg Norra, Dalarna, Sweden: occurrence and crystal structure refinement. Mineral. Mag. 66, 353-363.
  • Värmland
    • Filipstad
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. ; K:Gatedal
      • Nordmark district
        • Jakobsberg ore field
No reference listed
      • Persberg district
        • Pajsberg
Öfvers. KVA handl.(1888) 45, 7-10
  • Västmanland
    • Hällefors
      • Grythyttan
Ulf Nyberg collection and photo. Specimen number 2653
USA
 
  • Nevada
    • Nye Co.
      • Toquima Range
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Palache(1935):92; Dunn(1995):Pt3:409.
Palache(1935):92; Dunn(1995):Pt3:409.
Mineral and/or Locality  
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