Sahlinite
A valid IMA mineral species - grandfathered
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About Sahlinite
Carl A. Sahlin
Formula:
Pb14(AsO4)2O9Cl4
Colour:
Pale yellow
Hardness:
2 - 3
Specific Gravity:
7.95
Crystal System:
Monoclinic
Name:
Named in honor of Carl Andreas Sahlin (15 December 1861, Vollsjö, Sweden - 22 January 1943, Danderyd, Sweden), metallurgist and General Manager of the iron works in Sweden.
Isostructural with:
Unique Identifiers
Mindat ID:
3502
Long-form identifier:
mindat:1:1:3502:2
Similar Names
| Selenite | A variety of Gypsum | CaSO4 · 2H2O |
| Selenite (of Rau) | A synonym of Berzelianite | |
| Silinaite | A valid IMA mineral species | NaLiSi2O5 · 2H2O |
| Sillénite | A valid IMA mineral species - grandfathered | Bi12SiO20 |
| Suolunite | A valid IMA mineral species | Ca2(H2Si2O7) · H2O |
| Zuolinite | A valid IMA mineral species - pending publication | Ba2Sr(Nb4.5Fe3+0.5)O15 |
IMA Classification of Sahlinite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Pb2+14O9(As5+O4)2Cl4
First published:
1934
Classification of Sahlinite
8.BO.20
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
O : With only large cations, (OH, etc.):RO4 about 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
O : With only large cations, (OH, etc.):RO4 about 1:1
41.1.4.1
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p > 4:1
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p > 4:1
22.2.12
22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride
22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sah | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sahlinite
Transparency:
Translucent
Colour:
Pale yellow
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
On {010}, perfect.
On {010}, perfect.
Density:
7.95 g/cm3 (Measured)
Optical Data of Sahlinite
Type:
Biaxial (-)
Dispersion:
marked to extreme
Comments:
Refractive indices "higher than methylene iodide (probably very high)".
Chemistry of Sahlinite
Mindat Formula:
Pb14(AsO4)2O9Cl4
Element Weights:
Elements listed:
Crystallography of Sahlinite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 12.71 Å, b = 22.49 Å, c = 11.36 Å
β = 118.99°
β = 118.99°
Ratio:
a:b:c = 0.565 : 1 : 0.505
Unit Cell V:
2,840.37 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Aggregates of small thin scales.
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) |
|---|---|---|---|---|---|---|---|
| 0014564 | Sahlinite | Bonaccorsi E, Pasero M (2003) Crystal structure refinement of sahlinite, Pb14(AsO4)2O9Cl4 Mineralogical Magazine 67 15-21 |  | 2003 | Langban, Sweden | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.011 Å | (100) |
| 2.946 Å | (100) |
| 2.814 Å | (90) |
| 1.754 Å | (80) |
| 2.249 Å | (70) |
| 1.985 Å | (50) |
| 2.021 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Sahlinite
General Appearance of Type Material:
Aggregates of small, thin scales.
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, number g22707.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, number B13892.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, number B13892.
Geological Setting of Type Material:
Dolomitic rock.
Associated Minerals at Type Locality:
Other Language Names for Sahlinite
Common Associates
Associations Based on Photo Data:
| 11 photos of Sahlinite associated with Magnesioferrite | MgFe3+2O4 |
| 6 photos of Sahlinite associated with Calcite | CaCO3 |
| 4 photos of Sahlinite associated with Hausmannite | Mn2+Mn3+2O4 |
| 2 photos of Sahlinite associated with Asisite | Pb7SiO9Cl2 |
| 1 photo of Sahlinite associated with Hereroite | [Pb32(O,◻)21](AsO4)2[(Si,As,V,Mo)O4]2Cl10 |
| 1 photo of Sahlinite associated with Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
| 1 photo of Sahlinite associated with Kombatite | Pb14(VO4)2O9Cl4 |
| 1 photo of Sahlinite associated with Barysilite | Pb8Mn2+[Si2O7]3 |
| 1 photo of Sahlinite associated with Dolomite | CaMg(CO3)2 |
Related Minerals - Strunz-mindat Grouping
| 8.BO. | Ariegilatite | BaCa12(SiO4)4(PO4)2F2O |
| 8.BO. | Aravaite | Ba2Ca18(SiO4)6(PO4)3(CO3)F3O |
| 8.BO. | Theuerdankite | Ag3AsO4 |
| 8.BO.05 | Nacaphite | Na2Ca(PO4)F |
| 8.BO.10 | Petitjeanite | Bi3(PO4)2O(OH) |
| 8.BO.10 | Schumacherite | Bi3(VO4)2O(OH) |
| 8.BO.10 | Preisingerite | Bi3(AsO4)2O(OH) |
| 8.BO.15 | Hechtsbergite | Bi2(VO4)O(OH) |
| 8.BO.15 | Smrkovecite | Bi2(PO4)O(OH) |
| 8.BO.15 | Atelestite | Bi2(AsO4)O(OH) |
| 8.BO.20 | Kombatite | Pb14(VO4)2O9Cl4 |
| 8.BO.25 | Heneuite | CaMg5(CO3)(PO4)3(OH) |
| 8.BO.30 | Nefedovite | Na5Ca4(PO4)4F |
| 8.BO.35 | Kuznetsovite | [Hg2]2+Hg2+[AsO4]Cl |
| 8.BO.40 | Artsmithite | [Hg2]2+2Al(PO4)1.74(OH)1.78 |
| 8.BO.45 | Schlegelite | Bi7(AsO4)3(MoO4)2O4 |
| 8.BO.50 | Hereroite | [Pb32(O,◻)21](AsO4)2[(Si,As,V,Mo)O4]2Cl10 |
| 8.BO.50 | Erikjonssonite | (Pb32O21)[(V,Si,Mo,As)O4]4Cl9 |
| 8.BO.55 | Rudabányaite | (Ag2Hg2)(AsO4)Cl |
| 8.BO.60 | Segerstromite | Ca3(As5+O4)2[As3+(OH)3]2 |
| 8.BO.65 | Wiklundite | Pb2(Mn2+,Zn)3(Fe3+,Mn2+)2(Mn2+,Mg)19(As3+O3)2[(Si,As5+)O4]6(OH)18Cl6 |
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 Sahlinite
mindat.org URL:
https://www.mindat.org/min-3502.html
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References for Sahlinite
Reference List:
Aminoff, G. (1934) Note on a new Mineral from Långban (Sahlinite) Geologiska Föreningen i Stockholm Förhandlingar, 56 (3) 493-494 doi:10.1080/11035893409444898
Dunn, Pete J., Chao, George Y., Fitzpatrick, Joan J., Langley, Richard H., Fleischer, Michael, Zilczer, Janet A. (1986) New Mineral Names. American Mineralogist, 71 (1-2). 227-232
Jonsson, Erik (2003) Mineralogy and parageneses of Pb oxychlorides in Långban-type deposits, Bergslagen, Sweden. GFF, 125 (2) 87-98 doi:10.1080/11035890301252087
Localities for Sahlinite
Showing 6 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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.
Namibia | |
| Dunn (1991) |
Sweden (TL) | |
| Aminoff (1934) +1 other reference |
| Jonsson (2003) |
| Nysten (2003) +1 other reference |
UK | |
| Rumsey (2008) |
| Rumsey (2008) |
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Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden