Shirozulite Mineral Data

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General Shirozulite Information

Chemical Formula:

KMn3(AlSi3)O10(OH,F)2

Composition:

Molecular Weight = 480.43 gm

Potassium 7.32 % K 8.82 % K₂O

Barium 2.57 % Ba 2.87 % BaO

Magnesium 4.76 % Mg 7.89 % MgO

Titanium 0.40 % Ti 0.67 % TiO₂

Manganese 17.50 % Mn 22.59 % MnO

Aluminum 9.88 % Al 18.68 % Al₂O₃

Iron 2.32 % Fe 2.99 % FeO

Silicon 14.85 % Si 31.77 % SiO₂

Hydrogen 0.41 % H 3.69 % H₂O

Oxygen 39.86 % O

Fluorine 0.12 % F 0.12 % F

- % F -0.05 % -O=F₂

______ ______

100.00 % 100.03 % = TOTAL OXIDE

Empirical Formula:

K_0.9Ba_0.09Mn²⁺_1.53Mg_0.94Fe²⁺_0.2Al_0.29Ti_0.04Si_2.54Al_1.47O₁₀(OH)_1.97F_0.03

Environment:

Metamorphosed strata-bound Mn ore deposit. (Mn-dominant analogue of phlogopite; structure)

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Tauchi mine, Aichi Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Haruo Shirozu, Professor Emeritus of Kyushu University for his contributions to the crystal chemistry of sheet-silicate minerals.

Synonym:

IMA2001-045

Shirozulite Image

Images:

Shirozulite

Comments: Back-scattered-electron image of shirozulite. Shr = shirozulite; Tp = tephroite; Ap = apatite; Rds = rhodochrosite; Bm = bementite. (AmMin, 89:233).
Location: Tauchi mine, Aichi Prefecture, Japan. Scale: See Image.
© American Mineralogist

Shirozulite Crystallography

Axial Ratios:

a:b:c =0.5772:1:1.1043

Cell Dimensions:

a = 5.3791, b = 9.319, c = 10.2918, Z = 2; beta = 100.18° V = 507.78 Den(Calc)= 3.14

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.09(1)(001), 2.646(0.96)(131), 3.376(0.51)(003),2.458(0.46)(132), 2.194(0.36)(133), 3.426(0.33)(022),

Crystal Structure:

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Ishida K , Hawthorne F C , Hirowatari F , American Mineralogist , 89 (2004) p.232-238, Shirozulite, KMn3(Si3Al)O10(OH)2, a new manganese-dominant trioctahedral mica:, Description and crystal structure, Note: Displacement factors for O1, O2 and O4 have been altered.

Physical Properties of Shirozulite

Cleavage:

{001} Perfect

Color:

Dark reddish brown.

Density:

3.2

Diaphaneity:

Transparent

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Optical Properties of Shirozulite

Gladstone-Dale:

CI meas= 0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1977,KPDmeas= 0.194,KC= 0.2068
Ncalc = 1.65 - 1.66

Optical Data:

Biaxial (-), a=1.592, b=1.635, g=1.635, bire=0.0430

Calculated Properties of Shirozulite

Electron Density:

Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Shirozulite =3.14 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Shirozulite= 17.49 barns/electron
U=PE_Shirozulite x r_electron= 53.56 barns/cc.

Radioactivity:

GRapi = 103.02 (Gamma Ray American Petroleum Institute Units)
Concentration of Shirozulite per GRapi unit = 0.97 (%)

Estimated Radioactivity from Shirozulite - barely detectable

Shirozulite Classification

Dana Class:

71.02.02b.01b (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

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 Shirozulite Information

References:

NAME( AmMin, v 89, p 232) PHYS. PROP.(AmMin, v 89, p 232) OPTIC PROP.(AmMin, v 89, p 232)

See Also:

Links to other databases for Shirozulite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Shirozulite

KMn3(AlSi3)O10(OH,F)2
Dana No: 71.02.02b.01b Strunz No: 09.EC.20
Locality:

Notes: