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Norrishite

Pictures (2 Images total)

Norrishite
Views (File:
1401620729
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Norrishite
Reddish brown masses,; FOV 4 x 2 mm; Cerchiara Mine, Borghetto Vara, La Spezia Province, Liguria, Italy
Copyright: Roberto Bosi; Contribution: Roberto Bosi
Collection: Roberto Bosi
Location: Italien/Ligurien (Liguria), Region/La Spezia, Provinz/Vara-Tal/Cerchiara Mine
Mineral: Norrishite
Image: 1401620729
License: Usage for Mineralienatlas project only
Norrishite

Reddish brown masses,; FOV 4 x 2 mm; Cerchiara Mine, Borghetto Vara, La Spezia Province, Liguria, Italy

Collection: Roberto Bosi
Copyright: Roberto Bosi
Contribution: Roberto Bosi 2014-06-01
Locality: Cerchiara Mine / Vara-Tal / La Spezia, Provinz / Ligurien (Liguria), Region / Italien
Norrishit
Views (File:
1420534870
): 748
Norrishit
Bildbreite: 2 mm, Fundort: Cerchiara Mine, Borghetto Vara, La Spezia Province, Liguria, Italien
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Italien/Ligurien (Liguria), Region/La Spezia, Provinz/Vara-Tal/Cerchiara Mine
Mineral: Norrishite
Image: 1420534870
License: Usage for Mineralienatlas project only
Norrishit

Bildbreite: 2 mm, Fundort: Cerchiara Mine, Borghetto Vara, La Spezia Province, Liguria, Italien

Copyright: Stephan Wolfsried
Contribution: Hg 2015-01-06
Locality: Cerchiara Mine / Vara-Tal / La Spezia, Provinz / Ligurien (Liguria), Region / Italien

Collectors Summary

Color braun, grau, grün, gelb, rötlichbraun
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages vollkommen {001}, schlecht {010} {100}
Solubility +++ HF-H2SO4
Crystal System monoklin, C2/m

Chemism

Chemical formula

KLiMn3+2Si4O12

Chemical composition

Lithium, Mangan, Silicium, Kalium, Sauerstoff

Unit weight: 460.2508898 u; Number of atoms in the formula: 20

Info

Empirical formula:

KLiMn2Si4O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Lithium

Li

1.51

1

5.00

6.9412000

6.9412000

Oxygen

O

41.71

12

60.00

15.9994300

191.9931600

Silicon

Si

24.41

4

20.00

28.0855300

112.3421200

Potassium

K

8.49

1

5.00

39.0983100

39.0983100

Manganese

Mn

23.87

2

10.00

54.9380499

109.8760998

Analysis wt%

SiO2 : 51.60, Al2O3 : 0.93, Mn2O3 : 31.22, Li2O : 3.20, K2O : 9.35, H2O : 0.66 (Ref: American Mineralogist 89)

Strunz 9th edition incl. updates

9.EC.20

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
20:Phlogopit-Gruppe

Lapis Classification

VIII/H.11-030

VIII: SILIKATE
H: Schichtsilikate
11: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Lithionit/Biotit-Reihe

Classification by Hölzel

9.ED.250

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Mica group  ⇒ True micas

Optical Properties

Color

braun, grau, grün, gelb, rötlichbraun

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

Lustre

Glasglanz

max. Birefringence

0.149

Birefringence chart\! Norrishite title=Birefringence chart Norrishite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.636

RI value β

1.687

RI value γ / ε

1.785

Ri mean

1.703

2V angle

Biaxial (+) 74° (gemessen) 75.2° (berechnet)

Orientation

Z = b, Y ^ a = 20

Dispersion

stark, r > v

Absorption

Y > Z > X

Pleochroism

gelb, limettengrün, olivegrün

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

5.293

Cell parameters b (Å)

8.936

Cell parameters c (Å)

10.077

Cell parameters a/b or c/a

0.592

Cell parameters c/b

1.128

Cell parameters α

90°

Cell parameters β

98.0

Cell parameters γ

90°

Z

2

Volume (ų)

471.986

X-Ray Powder Diffraction

10.01(100),
4.464(50),
3.571(60),
3.329(80),
3.160(70),
2.620(50),
2.549(50),
2.365(60)

XRD chart Norrishite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.264 (gemessen) 3.21 (berechnet)

3.238 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}, schlecht {010} {100}

Instability

+++ HF-H2SO4

Preface

Author (Name, Year)

Eggleton & Ashley, 1989

References

American Mineralogist 74 (1989), 1360

IMA group assignments

 
 
 
 

 
 
 
 
 

 
 
 
K(Mg,Fe2+)Al[(OH)2|Si4O10]
monoklin
 

 
 
 
KFe2+3(Si3Al)O10(OH,F)2
monoklin
C2/m

 
 
 
NaMg3(AlSi3)O10(OH)2
monoklin
C2/m

 
 
 
KAl2(Si3B)O10(OH,F)2
monoklin
C2/m

 
 
 
K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2
monoklin
C2

 
 
 
K(Cr,Al)2[(OH,F)2|AlSi3O10]
monoklin
C2/c

 
 
 
KMg2Al[(OH)2|Al2Si2O10]
monoklin
C2

 
 
 
NaLiAl2(Al2Si2)O10(OH)2
monoklin
Cc

 
 
 
K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
KFe32+[(F,OH)2|AlSi3O10]
monoklin
C2/m

 
 
 
(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]
monoklin
C2/c

 
 
 
K(Zn,Mn)3Si3AlO10(OH)2
monoklin
C2/m

 
 
 
K(Li,Al,Mn2+)3(Si,Al)4O10(F,OH)2
monoklin
C2

 
 
 
KMn0.52+Fe1.52+Mg0.5[F2|Si4O10]
monoklin
C2/m

 
 
 
KAl2(Si3Al)O10(OH,F)2
monoklin
C2/c

 
 
 
CsAl2(Si,Al)4O10(OH,F)2
monoklin
C2/c

 
 
 
KLiMn3+2Si4O12
monoklin
C2/m

 
 
 
NaAl2(Si3Al)O10(OH)2
monoklin
C2/c

 
 
 
KMg3(Si3Al)O10(F,OH)2
monoklin
C2/m

 
 
 
KLi2AlSi4O10(F,OH)2
monoklin
C2/m

 
 
 
NaMg2Al3Si2O10(OH)2
monoklin
C2/m

 
 
 
K(V,Al,Mg)2AlSi3O10(OH)2
monoklin
C2/m

 
 
 
K(Mn2+,Mg)3[(OH)2|AlSi3O10]
 
 

 
 
 
KFe22+Al(Al2Si2)O10(F,OH)2
monoklin
C2/m

 
 
 
CsLi2AlSi4O10F2
monoklin
 

 
 
 
KLiMg2Si4O10F2
monoklin
C/2m

 
 
 
KFe2+3(Si3Fe3+)O10(OH)2
monoklin
C2/m

 
 
 
KMg3[(F,OH)2|(Al,Fe3+)Si3O10]
monoklin
C2/m

 
 
 
(NH4,K)Al2(Si3Al)O10(OH)2
monoklin
C2/m

 
 
 
KLi1.5Al1.5[F2|AlSi3O10]
monoklin
C2/m

 
 
 
KMg2.5Si4O10F2
monoklin
C2/m

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Actuality: 17. Jul 2024 - 20:39:12

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CNMNC symbol

Symbol

Nrr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) AMeeZgFx70uxc8wVg4odIA
GUID (Global unique identifier) 669EC700-7101-4BEF-B173-CC15838A1D20
Database ID 2783