Sudoite Mineral Data

Sudoite Mineral Data +

General Sudoite Information

Chemical Formula:

Mg2(Al,Fe+++)3Si3AlO10(OH)8

Composition:

Molecular Weight = 546.77 gm

Magnesium 8.45 % Mg 14.01 % MgO

Aluminum 19.25 % Al 36.36 % Al₂O₃

Iron 3.06 % Fe 1.31 % FeO / 2.92 % Fe₂O₃

Silicon 15.41 % Si 32.97 % SiO₂

Hydrogen 1.46 % H 13.01 % H₂O

Oxygen 52.38 % O

______ ______

100.00 % 100.59 % = TOTAL OXIDE

Empirical Formula:

Mg_1.9Fe²⁺_0.1Al_2.9Fe³⁺_0.2Si₃AlO₁₀(OH)_7.9

Environment:

Disseminated in hematite ore.

IMA Status:

Approved IMA 1962

Locality:

Hanaoka and Kamakita mines, Aonori Prefecture; Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Toshio Sudo (1911-), University of Tokyo, Japan.

Sudoite Image

Images:

Sudoite Manganite

Comments: Pinkish to nearly white earthy sudoite with dark manganite.
Location: Ilfeld, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Sudoite Crystallography

Axial Ratios:

a:b:c =0.5773:1:1.5749

Cell Dimensions:

a = 5.237, b = 9.07, c = 14.285, Z = 2; beta = 97.02° V = 673.45 Den(Calc)= 2.70

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): 2.501(1), 4.52(0.85), 14.2(0.8),

Physical Properties of Sudoite

Cleavage:

[100] Perfect

Color:

White.

Density:

2.63 - 2.68, Average = 2.65

Diaphaniety:

Translucent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2.5-3.5 - Finger Nail-Copper Penny

Luster:

Pearly

Streak:

white

Optical Properties of Sudoite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2178,KPDmeas= 0.2215,KC= 0.2253

Optical Data:

Biaxial (-), a=1.581-1.583, b=1.584-1.589, g=1.591-1.601, bire=0.0100-0.0180, 2V(Calc)=68-72, 2V(Meas)=64-70.

Calculated Properties of Sudoite

Electron Density:

r_electron=2.66 gm/cc
note: r_Sudoite=2.66 gm/cc.

Fermion Index

Fermion Index = 0.01654
Boson Index = 0.98346

Photoelectric:

PE_Sudoite= 2.26 barns/electron
U=PE_Sudoite x r_electron= 6.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sudoite is Not Radioactive

Sudoite Classification

Dana Class:

71.4.1.3 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.4)interlayered 1:1, 2:1, and octahedra

(71.4.1)Chlorite group (Tri-Dioctahedral)

71.4.1.1 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m

71.4.1.2 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

71.4.1.3 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

71.4.1.4 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.4.1.5 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.4.1.6 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

71.4.1.7 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

71.4.1.8 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.4.1.9 Orthochamosite! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

71.4.1.10 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

Strunz Class:

VIII/H.23-10 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.23 - Chlorite group

VIII/H.23-10 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

VIII/H.23-20 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-30 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

VIII/H.23-40 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

VIII/H.23-50 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

VIII/H.23-60 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-70 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-80 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho

VIII/H.23-90 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

VIII/H.23-95 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

VIII/H.23-100 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1

VIII/H.23-110 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2

Other Sudoite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

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Sudoite

Mg2(Al,Fe+++)3Si3AlO10(OH)8
Dana No: 71.4.1.3 Strunz No: VIII/H.23-10
Locality:

Notes: