Barysilite
A valid IMA mineral species - grandfathered
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About Barysilite
Formula:
Pb8Mn2+[Si2O7]3
Colour:
White, pink to colorless; tarnishes on exposure
Lustre:
Pearly
Hardness:
3
Specific Gravity:
6.55 - 6.71
Crystal System:
Trigonal
Name:
Named in 1888 by Stens Anders Hjalmar Sjögren and Carl Herman Lundström from the Greek ÎČαÏÏ
ζ for "heavy" in allusion to its density and λÎčΞοζ for its containing SILicon.
This page provides mineralogical data about Barysilite.
Unique Identifiers
Mindat ID:
546
Long-form identifier:
mindat:1:1:546:3
GUID
(UUID V4):
(UUID V4):
3b74f687-77fa-4e1f-a754-490eeea0b097
IMA Classification of Barysilite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Pb8Mn(Si2O7)3
First published:
1888
Classification of Barysilite
9.BC.20
9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination
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
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
14 : Silicates not Containing Aluminum
13 : Silicates of Pb
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Bsl | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Bsl | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Pronunciation of Barysilite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Barysilite
Pearly
Transparency:
Translucent
Comment:
Pearly on cleavage.
Colour:
White, pink to colorless; tarnishes on exposure
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
{0001}
Fracture:
Irregular/Uneven
Density:
6.55 - 6.71 g/cm3 (Measured) 6.54 g/cm3 (Calculated)
Optical Data of Barysilite
Type:
Uniaxial (-)
RI values:
nω = 2.033 - 2.070 nε = 2.015 - 2.050
Max Birefringence:
δ = 0.018 - 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Chemistry of Barysilite
Mindat Formula:
Pb8Mn2+[Si2O7]3
Elements listed:
Common Impurities:
Al,Fe,Zn,Mg,Ca
Crystallography of Barysilite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3c
Setting:
R3c
Cell Parameters:
a = 9.821 Å, c = 38.35 Å
Ratio:
a:c = 1 : 3.905
Unit Cell V:
3,203.37 Ă
Âł (Calculated from Unit Cell)
Z:
6
Morphology:
As platy, subparallel crystals in lamellar and ball-like aggregates, to 3 mm; granular, massive.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009300 | Barysilite | Lajzerowicz J (1965) Etude par diffraction des rayons X et absorption infra-rouge de la barysilite, MnPb8.3Si2O7, et de composes isomorphes Acta Crystallographica 20 357-363 |  | 1965 | 0 | 293 | |
| 0014563 | Barysilite | Kolitsch U, Holtstam D (2002) Barysilite from Garpenberg Norra, Dalarna, Sweden: occurrence and crystal structure refinement Mineralogical Magazine 66 353-363 |  | 2002 | Garpenberg Nora mine, Dalarna, Sweden | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
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Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.957 Ă | (100) |
| 2.765 Ă | (80) |
| 2.675 Ă | (80) |
| 3.88 Ă | (60) |
| 3.16 Ă | (60) |
| 4.57 Ă | (50) |
| 3.22 Ă | (50) |
Comments:
LĂ„ngban district, Sweden.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-đ alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Barysilite
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, number g14843 (holotype).
Harvard University, Cambridge, Massachusetts, USA, 114630.
Harvard University, Cambridge, Massachusetts, USA, 114630.
Geological Setting of Type Material:
Iron ores.
Associated Minerals at Type Locality:
Reference:
Sjögren, A., Lundström, C.H. (1888) Om barysilit, ett förr ej uppmĂ€rksammat mineral frĂ„n Harstigen. Ăfversigt af Kungl. Vetenskapsakademiens Handlingar: 45: 7-10. (in Swedish)
Synonyms of Barysilite
Other Language Names for Barysilite
Common Associates
Associated Minerals Based on Photo Data:
| 16 photos of Barysilite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 9 photos of Barysilite associated with Margarosanite | Pb(Ca,Mn2+)2(Si3O9) |
| 7 photos of Barysilite associated with Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| 6 photos of Barysilite associated with Baryte | BaSO4 |
| 5 photos of Barysilite associated with Garnet Group | X3Z2(SiO4)3 |
| 4 photos of Barysilite associated with Caswellite | Ca3Al2(SiO4)3 |
| 4 photos of Barysilite associated with Svabite | Ca5(AsO4)3F |
| 4 photos of Barysilite associated with Calcite | CaCO3 |
| 4 photos of Barysilite associated with Nasonite | Pb6Ca4(Si2O7)3Cl2 |
| 4 photos of Barysilite associated with Willemite | Zn2SiO4 |
Related Minerals - Strunz-mindat Grouping
| 9.BC. | KozĆowskiite | Ca4Fe2+2Sn3(Si2O7)2(Si2O6OH)2 |
| 9.BC. | Anorthoyttrialite-(Y) | Y4(SiO4)(Si3O10) |
| 9.BC.05 | Gittinsite | CaZrSi2O7 |
| 9.BC.05 | Keiviite-(Y) | Y2Si2O7 |
| 9.BC.05 | Keiviite-(Yb) | Yb2Si2O7 |
| 9.BC.05 | Thortveitite | Sc2Si2O7 |
| 9.BC.05 | Yttrialite-(Y) | (Y,Th)2Si2O7 |
| 9.BC.10 | Keldyshite | (Na,H)2ZrSi2O7 |
| 9.BC.10 | Khibinskite | K2ZrSi2O7 |
| 9.BC.10 | Parakeldyshite | Na2ZrSi2O7 |
| 9.BC.15 | Rankinite | Ca3Si2O7 |
| 9.BC.25 | Edgarbaileyite | [Hg2]2+3[Si2O7] |
| 9.BC.30 | Kristiansenite | Ca4Sc2Sn2(Si2O7)2(Si2O6OH)2 |
| 9.BC.30 | Silesiaite | Ca4Fe3+2Sn2(Si2O7)2(Si2O6OH)2 |
| 9.BC.35 | Percleveite-(Ce) | Ce2Si2O7 |
| 9.BC.35 | Percleveite-(La) | La2Si2O7 |
| 9.BC.40 | Scottyite | BaCu2Si2O7 |
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.
Internet Links for Barysilite
mindat.org URL:
https://www.mindat.org/min-546.html
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References for Barysilite
Reference List:
Ito, Jun, Frondel, Clifford (1967) Syntheses of lead silicates: larsenite, barysilite and related phases. American Mineralogist, 52 (7-8) 1077-1084
Dunn, Pete J. (1985) The lead silicates from Franklin, New Jersey: occurrence and composition. Mineralogical Magazine, 49 (354) 721-727 doi:10.1180/minmag.1985.049.354.12
Localities for Barysilite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Germany | |
| Schellhorn (1987) +1 other reference |
Namibia | |
| Dunn (1991) |
Sweden | |
| Kolitsch et al. (2002) |
| Ulf Nyberg collection and photo. ... |
| Gatedal (n.d.) +1 other reference |
| Holtstam et al. (1999) | |
| Holtstam et al. (1999) | |
| Holtstam et al. (1999) | |
| Flink (1917) +3 other references |
| Ăfvers. KVA handl. (1888) +1 other reference |
USA | |
| Castor et al. (2004) |
| Palache (1935) +1 other reference |
| Palache (1935) +1 other reference |
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Harstigen Mine, Pajsberg, Persberg ore district, Filipstad, VĂ€rmland County, Sweden