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Shirozulite

Additional Functions

Collectors Summary

Color dunkel rötlichbraun
Lustre Perlmuttglanz
Hardness (Mohs) 3
Cleavages vollkommen (001)

Chemism

Chemical formula

K(Mn2+,Mg)3[(OH)2|AlSi3O10]

Chemical composition

Aluminium, Magnesium, Mangan, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 486.184899475 u; Number of atoms in the formula: 22

Info

Empirical formula:

K(Mn0.75Mg0.25)3[(OH)2AlSi3O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.41

2

9.09

1.0079470

2.0158940
Oxygen

O

39.49

12

54.55

15.9994300

191.9931600
Magnesium

Mg

3.75

0.75

3.41

24.3050600

18.2287950
Aluminium

Al

5.55

1

4.55

26.9815382

26.9815382
Silicon

Si

17.33

3

13.64

28.0855300

84.2565900
Potassium

K

8.04

1

4.55

39.0983100

39.0983100
Manganese

Mn

25.42

2.25

10.23

54.9380499

123.6106123

Analysis wt%

SiO2 : 31.40, TiO2 : 0.71, Al2O3 : 18.45, FeO : 2.90, MnO : 22.38, MgO : 7.83, BaO : 2.77, K2O : 8.75, H2O : 3.66 (Ref: American Mineralogist 2004)

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.11-102

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.175

9: SILICATES
E: Phyllosilicates
D: Biotite-Group

IMA Classification

IMA Classification

 Mica group  ⇒ True micas

Optical Properties

Color

dunkel rötlichbraun

Lustre

Perlmuttglanz

max. Birefringence

0.043
Birefringence chart\! Shirozulite title=Birefringence chart Shirozulite

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

1.592

RI value β

1.635

RI value γ / ε

1.635

Ri mean

1.621

2V angle

Biaxial (-) v.sm.

Crystallography

Cell parameters a (Å)

5.379

Cell parameters b (Å)

9.319

Cell parameters c (Å)

10.292

Cell parameters a/b or c/a

0.577

Cell parameters c/b

1.104

Cell parameters α

90°

Cell parameters β

100.18

Cell parameters γ

90°

Z

2

Volume (ų)

507.8

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

115 on 001

Density (g/cm³)

3.2

3.18 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (001)

(Co-)Type locality

(Co-)Type locality

Japan/Honshū (Honschu), Insel/Chūbu (Chubu), Region/Aichi, Präfektur/Kitashitara, Landkreis/Shitara/Taguchi Mine

IMA group assignments

 
Mica group
 
 
 

 
 
True micas
 
 
 

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

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

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

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

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

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

 
 
 
Eastonite
KMg2Al[(OH)2|Al2Si2O10]
monoklin
C2

 
 
 
Ephesite
NaLiAl2(Al2Si2)O10(OH)2
monoklin
Cc

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

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

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

 
 
 
Fluorophlogopite
KMg3(AlSi3)O10F2
monoklin
C2/m

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

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

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

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

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

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

 
 
 
Norrishite
KLiMn3+2Si4O12
monoklin
C2/m

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

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

 
 
 
Polylithionite
KLi2AlSi4O10(F,OH)2
monoklin
C2/m

 
 
 
Preiswerkite
NaMg2Al3Si2O10(OH)2
monoklin
C2/m

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

 
 
 
Shirozulite
K(Mn2+,Mg)3[(OH)2|AlSi3O10]
 
 

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

 
 
 
Sokolovaite
CsLi2AlSi4O10F2
monoklin
 

 
 
 
Tainiolite
KLiMg2Si4O10F2
monoklin
C/2m

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

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

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

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

 
 
 
Yangzhumingite
KMg2.5Si4O10F2
monoklin
C2/m

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Actuality: 13. Jun 2025 - 14:46:16

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Shirozulite

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Russian

Широцулит

Alternative Name

Japanese

白水雲母

CNMNC (IMA)-Number

IMA 2001-045

CNMNC symbol

Symbol

Szu

IDs

GUSID (Global unique identifier short form) ogIbbU_g20mNlb3Sdqffrw
GUID (Global unique identifier) 6D1B02A2-E04F-49DB-8D95-BDD276A7DFAF
Database ID 3504