Parsettensite (original) (raw)
A valid IMA mineral species - grandfathered
About ParsettensiteHide
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Formula:
(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
Previous, simplified formula: K1.2Mn8(Si,Al)12O26(OH)10.
Colour:
Yellowish brown to honey-yellow, light brown, copper-red
Lustre:
Vitreous, Metallic, Sub-Metallic
Crystal System:
Monoclinic
Name:
Named in 1923 by Johann Jakob after the type locality, Alp Parsettens.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3125:3
9e2497f8-6a08-4ca1-9dc5-f64ef5e186ef
IMA Classification of ParsettensiteHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
Type description reference:
Classification of ParsettensiteHide
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9.EG.40
9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
74.1.3.1
74 : PHYLLOSILICATES Modulated Layers
1 : Modulated Layers with joined islands
14.17.9
14 : Silicates not Containing Aluminum
17 : Silicates of Mn
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Psn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Psn | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of ParsettensiteHide
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Vitreous, Metallic, Sub-Metallic
Comment:
metallic appearance due to strong colour and strong reflection on cleavages
Colour:
Yellowish brown to honey-yellow, light brown, copper-red
Comment:
No value is given in the original description. A value of ~1.5 is given in the Handbook of Mineralogy, but seems very doubtful (too low). Range given here is based on some uncertain references and by comparison with stilpnomelane (Fe analogue).
Cleavage:
Perfect
[001] Perfect
Comment:
Single flakes are rather brittle.
Density:
2.59 g/cm3 (Measured) 2.76 g/cm3 (Calculated)
Optical Data of ParsettensiteHide
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RI values:
_n_α = 1.546 _n_β = 1.576 _n_γ = 1.576
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
colourless - pale yellow, greenish yellow
Chemistry of ParsettensiteHide
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Mindat Formula:
(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
Previous, simplified formula: K1.2Mn8(Si,Al)12O26(OH)10.
Common Impurities:
Ti,B,Fe,V,Mg,Ba,Cl,C,P
Crystallography of ParsettensiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 39.10 Å, b = 22.84 Å, c = 17.95 Å
β = 135.60°
Ratio:
a:b:c = 1.712 : 1 : 0.786
Morphology:
platy crystals, lamellar, massive
Twinning:
Invariably twinned.
Comment:
C2/m setting; pseudo-orthorhombic, pseudo-hexagonal
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001653 | Parsettensite | Eggleton R A, Guggenheim S (1994) The use of electron optical methods to determine the crystal structure of a modulated phyllosilicate: Parsettensite American Mineralogist 79 426-437 |  |
1994 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.1 Å | (100) |
| 6.2 Å | (20) |
| 4.5 Å | (40) |
| 4.2 Å | (60) |
| 3.84 Å | (50) |
| 3.70 Å | (50) |
| 3.26 Å | (20) |
| 3.14 Å | (50) |
| 2.79 Å | (80) |
| 2.65 Å | (100) |
| 2.42 Å | (50) |
| 2.36 Å | (40) |
| 2.18 Å | (40) |
| 2.04 Å | (20) |
| 1.943 Å | (10) |
| 1.634 Å | (80) |
| 1.617 Å | (60) |
| 1.580 Å | (50) |
| 1.520 Å | (10) |
| 1.444 Å | (10) |
| 1.410 Å | (10) |
| 1.388 Å | (10) |
| 1.320 Å | (100) |
| 1.300 Å | (10) |
| 1.230 Å | (20) |
Geological EnvironmentHide
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Type Occurrence of ParsettensiteHide
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Place of Conservation of Type Material:
Federal Institute of Technology, Zurich, Switzerland, 194806.
The Natural History Museum, London, England.
Harvard University, Cambridge, Massachusetts, USA, 90497.
Geological Setting of Type Material:
metamorphosed manganese deposit
Reference:
Jakob, J. (1923) Vier Mangansilikate aus dem Val d'Err (Kt. Graubünden). Schweizerische Mineralogische und Petrographische Mitteilungen: 3: 227-237.
Synonyms of ParsettensiteHide
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Other Language Names for ParsettensiteHide
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Relationship of Parsettensite to other SpeciesHide
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Other Members of this group:
| Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 | Tric. 1 : _P_1 |
|---|---|---|
| Franklinphilite | (K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O | Tric. |
| Lennilenapeite | K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O | Tric. |
| Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O | Tric. 1 : _P_1 |
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.EG.05 | Cymrite | BaAl2Si2(O,OH)8 · H2O | Mon. 2 : _P_21 |
|---|---|---|---|
| 9.EG.10 | Naujakasite | (Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26 | Mon. |
| 9.EG.10 | Manganonaujakasite | Na6(Mn2+,Fe2+)Al4Si8O26 | Mon. 2/m : _B_2/m |
| 9.EG.15 | Dmisteinbergite | Ca(Al2Si2O8) | Trig. 32 : _P_312 |
| 9.EG.20 | Kampfite | Ba12(Si11Al5)O31(CO3)8Cl5 | Mon. m |
| 9.EG.25 | Strätlingite | Ca2Al2SiO7 · 8H2O | Trig. 3_m_ : R_3_m |
| 9.EG.25 | Vertumnite | Ca4Al4Si4O6(OH)24 · 3H2O | Mon. 2/m : _P_21/m |
| 9.EG.30 | Eggletonite | (Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O | Mon. |
| 9.EG.30 | Ganophyllite | (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O | Mon. 2/m |
| 9.EG.30 | Tamaite | (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O | Mon. 2/m : _P_21/b |
| 9.EG.35 | Coombsite | KMn2+13(Si,Al)18O42(OH)14 | Trig. |
| 9.EG.35 | Zussmanite | K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14 | Trig. 3 : _R_3 |
| 9.EG.40 | Franklinphilite | (K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O | Tric. |
| 9.EG.40 | Lennilenapeite | K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O | Tric. |
| 9.EG.40 | Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O | Tric. 1 : _P_1 |
| 9.EG.40 | Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 | Tric. 1 : _P_1 |
| 9.EG.45 | Latiumite | (Ca,K)4(Si,Al)5O11(SO4,CO3) | Mon. 2 : _P_21 |
| 9.EG.45 | Tuscanite | KCa6(Si,Al)10O22(SO4,CO3)2(OH) · H2O | Mon. 2/m : _P_21/b |
| 9.EG.45 | Levantite | KCa3Al2(SiO4)(Si2O7)(PO4) | Mon. 2 : _P_21 |
| 9.EG.50 | Jagoite | Pb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6 | Hex. 6_m_2 : _P_6_c_2 |
| 9.EG.55 | Wickenburgite | CaPb3Al2Si10O24(OH)6 | Trig. 3_m_ : P_31_c |
| 9.EG.60 | Hyttsjöite | Pb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2O | Trig. 3 : _R_3 |
| 9.EG.65 | Armbrusterite | K5Na7Mn15[(Si9O22)4](OH)10 · 4H2O | Mon. 2/m : _B_2/m |
| 9.EG.70 | Britvinite | [Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)] | Tric. 1 : _P_1 |
| 9.EG.70 | Roymillerite | Pb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5 | Tric. 1 : _P_1 |
| 9.EG.75 | Bannisterite | (Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O | Mon. 2/m : _B_2/b |
| 9.EG.75 | UM1989-30-SiO:AlBaCaFeHKMgMn | (Ba,Ca)(Mn,Fe,Mg)22(Si,Al)32O76(OH)16 · 12H2O | |
| 9.EG.75 | Kayupovaite | Na2Mn10[(Si14Al2)O38(OH)8] · 7H2O | Mon. 2/m : _B_2/b |
Fluorescence of ParsettensiteHide
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Other InformationHide
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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 ParsettensiteHide
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References for ParsettensiteHide
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Localities for ParsettensiteHide
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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
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- 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). 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.