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Norrishite Mineral Data

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General Norrishite Information

Help on Chemical  Formula: Chemical Formula: K(Mn+++2Li)Si4O10(O)2
Help on Composition: Composition: Molecular Weight = 460.25 gm
   Potassium   8.50 %  K    10.23 % K2O
   Lithium     1.51 %  Li    3.25 % Li2O
   Manganese  23.87 %  Mn   34.30 % Mn2O3
   Silicon    24.41 %  Si   52.22 % SiO2
   Oxygen     41.71 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KMn3+2LiSi4O12
Help on Environment: Environment: Major to minor component of manganiferous schists, formed through metamorphism of a stratiform manganese deposit. Resembles biotite.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Hoskins mine, three km west of Grenfell, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Keith Norrish of the Division of Soils, Commonwealth Scientific and Industrial Research Organization, Australia.
Help on Name Pronunciation: Name Pronunciation: Norrishite + Pronunciation Say NORRISHITE
 

Norrishite Image

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  Norrishite

Comments: Thin section photomicrograph showing norrishite (Nrs) associated with kornite (Krn), sugilite (Sgl), and Mn-rich pectolite (Pct) (AmMin 88:190).
Location: Silicate-rich sample from the Wessels mine, Kalahari manganese field, South Africa. Scale: Picture Size 2.4 mm.
© American Mineralogist

Norrishite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5941:1:1.1275
Help on Cell Dimensions: Cell Dimensions: a = 5.29, b = 8.904, c = 10.04, Z = 2; beta = 98.15° V = 468.13 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.01(1), 3.329(0.8), 3.16(0.7),
 

Physical Properties of Norrishite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brownish black, Black.
Help on Density: Density: 3.264
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: light brown
 

Optical Properties of Norrishite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.11 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.109 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2155,KPDmeas= 0.2153,KC= 0.2419
Ncalc = 1.79
Help on Optical Data: Optical Data: Biaxial (+), a=1.636, b=1.687, g=1.785, bire=0.1490, 2V(Calc)=76, 2V(Meas)=74-75.
Help on Pleochroism (x): Pleochroism (x): bright lemon yellow.
Help on Pleochroism (y): Pleochroism (y): lime green.
Help on Pleochroism (z): Pleochroism (z): brownish yellow.
 

Calculated Properties of Norrishite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Norrishite =3.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENorrishite = 7.89 barns/electron
U=PENorrishite x relectron= 25.05 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 119.31 (Gamma Ray American Petroleum Institute Units)
Concentration of Norrishite per GRapi unit = 0.84 (%)

Estimated Radioactivity from Norrishite - barely detectable

 

Norrishite Classification

Help on  Dana Class: Dana Class: 71.02.02b.11 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02b)Mica Group (Biotite subgroup)
 
71.02.02b.01 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.01a Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
71.02.02b.01b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
71.02.02b.01c Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m
 
71.02.02b.02 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m
 
71.02.02b.03 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
71.02.02b.03a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
71.02.02b.04 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
71.02.02b.05 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.05a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
71.02.02b.06 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
71.02.02b.07 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono
 
71.02.02b.08 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
71.02.02b.08a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
71.02.02b.08b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono
 
71.02.02b.09 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m
 
71.02.02b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
71.02.02b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
71.02.02b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
71.02.02b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m
 
71.02.02b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
71.02.02b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
71.02.02b.18 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m
Help on  Strunz Class: Strunz Class: 09.EC.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.20 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
09.EC.20 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
09.EC.20 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
09.EC.20 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono
 
09.EC.20 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
09.EC.20 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
09.EC.20 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
09.EC.20 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
09.EC.20 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m
 
09.EC.20 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
09.EC.20 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
09.EC.20 Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
09.EC.20 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
09.EC.20 Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono
 
09.EC.20 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m
 
09.EC.20 Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m
 

Other Norrishite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AmMin, Vol.87, p189) OPTIC PROP.(Am.Min.,Vol.74,p1360-1367,1989)
Help on See Also: See Also: Links to other databases for Norrishite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Norrishite Specimen Label here :

Norrishite

K(Mn+++2Li)Si4O10(O)2
Dana No: 71.02.02b.11 Strunz No: 09.EC.20
Locality:

 

Notes:

 

 
   
 


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