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Zussmanite

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Formula:
K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
System:
Trigonal
Colour:
Light to medium green
Name:
Named after Jack Zussman (1924 - ), Professor of Mineralogy, University of Manchester (England).
Prof. Zussman was one of the authors of the Rock-Forming Minerals book series (W.A. Deer, R.A. Howie and J. Zussman).
Isostructural with:
Fe-analogue of Coombsite.

Dark green micaceous mineral in stilpnomelane and quartz gneiss. A modulated phyllosilicate.

Classification of Zussmanite

Approved 1964
9.EG.35

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
74.1.4.1

74 : PHYLLOSILICATES Modulated Layers
1 : Modulated Layers with joined islands
16.16.17

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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First Recorded Occurrence of Zussmanite

General Appearance of First Recorded Material:
Green grains and bands of grains in black matrix
Year of Discovery:
1964
Geological Setting of First Recorded Material:
Blue-schist facies metamorphism.
Associated Minerals at First Recorded Locality:

Physical Properties of Zussmanite

Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):
Transparent
Colour:
Light to medium green
Tenacity:
Flexible
Cleavage:
Perfect
{0001}
Fracture:
Micaceous
Density:
3.146 g/cm3 (Measured)    3.14 g/cm3 (Calculated)

Crystallography of Zussmanite

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 11.66Å, c = 28.69Å
Ratio:
a:c = 1 : 2.461
Unit Cell Volume:
V 3,377.99 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Platy granular
X-Ray Powder Diffraction Data:
d-spacingIntensity
9.60 (100)
4.78 (100)
3.78 (50)
3.69 (50)
3.19 (80)
2.74 (50)
2.20 (50)
1.908 (50)

Optical Data of Zussmanite

Type:
Uniaxial (-)
RI values:
nω = 1.643 nε = 1.623
Birefringence:
0.020
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
parallel
Pleochroism:
Weak
Comments:
O = pale green, e = colourless

Chemical Properties of Zussmanite

Formula:
K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
Essential elements:
All elements listed in formula:
Common Impurities:
Na,Ti

Relationship of Zussmanite to other Species

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2O
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26
9.EG.15DmisteinbergiteCaAl2Si2O8
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2O
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2O
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
9.EG.40Franklinphilite(K,Na)4(Mn,Zn,Mg,Fe)48(Si,Al)72(O,OH)216 · 6H2O
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
9.EG.40ParsettensiteK1.2Mn8(Si,Al)12O26(OH)10
9.EG.40Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36 · nH2O
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
9.EG.50JagoitePb18Fe43+[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6
9.EG.60HyttsjöitePb18Ba2Ca5Mn22+Fe23+Si30O90Cl · 6H2O
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2O
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
9.EG.75BannisteriteCa0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8 · 5.5H2O
16.16.1KanonaiteMn3+Al(SiO4)O
16.16.2SpessartineMn32+Al2(SiO4)3
16.16.3DavreuxiteMnAl6Si4O17(OH)2
16.16.4SursassiteMn22+Al3(Si2O7)(SiO4)(OH)3
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4
16.16.6KellyiteMn22+Al(AlSiO5)(OH)4
16.16.7PennantiteMn52+Al(AlSi3O10)(OH)8
16.16.8Akatoreite(Mn2+,Fe2+)9Al2(HSi4O13)2(OH)6
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
16.16.10Mangano-ferri-eckermannite[Na][Na2][Mn42+(Fe3+)]Si8O22(OH)2
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
16.16.15BannisteriteCa0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8 · 5.5H2O
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
16.16.20MacfalliteCa2(Mn3+,Al)3(Si2O7)(SiO4)(OH)3
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
16.16.23OkhotskiteCa2(Mn2+,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.24Pumpellyite-(Mn2+)Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)

Other Names for Zussmanite

Name in Other Languages:

Other Information

Not fluorescent in UV
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 Zussmanite

Reference List:
Agrell, S.O. (1964) Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), American Mineralogist: 49.

Agrell, S.O., M.G. Brown & McKie (1965) Deerite, howieite and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California: American Mineralogist: 50: 278.

Lopez-Viera, A. & J. Zussman (1967) The crystal structure of the mineral zussmanite: Mineralogical Magazine: 36: 292-293.

Lopez-Viera, A. & J. Zussman (1969) Further details on the crystal structure of the mineral zussmanite: Mineralogical Magazine: 37: 49-60.

Boerner, U. (1969) Deerit, Howieit und Zussmanit, neue seltene Mineralien von einen Steinbruch bei Laytonville in Nord-Kalifornien: Aufschluss: 20: 338-341.

Mineralogical Magazine (1980): 43: 605.

Internet Links for Zussmanite

Localities for Zussmanite

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.
Australia
 
  • Tasmania
    • Balfour-Temma district
      • Temma
unpublished data, R. Bottrill
Chile
 
  • Los Lagos Region
    • Valdivia Province
Min Mag 1998 62, 6, 869-876
Norway
 
  • Buskerud
    • Drammen
Sigurd Stordal collection
USA
 
  • California
    • Mendocino Co.
      • Coastal Range
[MinRec 8:433]
Agrell, S.O. (1964), Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), Am.Min.: 49; MM 43 (1980), 605; HB2/2 (1995).; Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
        • Longvale
Anonymous (1964), Three new minerals from California (deerite, howieite, and zussmanite): California Division of Mines and Geology, Mineral Information Service: 17: 138; USGS MRDS database (2005), loc. file ID #10286314 & 10031493.
Mineral and/or Locality  
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