Sudoite information

Sudoite
Sudoite
General
Category	Chlorite_group
Formula; (repeating unit)	Mg2Al3(Si3Al)O10)(OH)8
Crystal system	Monoclinic
Identification
Color	White to light green
Mohs scale hardness	2.5–3.5
Luster	pearly, dull
Refractive index	nα = 1.581 à 1.583; nβ = 1.584 à 1.589; nγ = 1.591 à 1.601
Birefringence	biaxial (-) ; δ = 0.010 to 0.018; 2V = 64 to 70° (measured); 2V = 68 to 72° (calculated)
References	.

Sudoite is a mineral from the chlorite group. It was named after Toshio Sudo (1911-2000), professor of mineralogy at the University of Tokyo, in Japan, and a pioneer of clay science.^[3] The mineral tosudite also wears his name. It was approved as a valid species by the International Mineralogical Association in 1966.

^ Sudoite mineral information and data Mindat
^ Sudoite Mineral Data Webmineral
^ Kohyama, Norihiko (2000). "In memory of Prof. Toshio Sudo". Clay Science. 11 (2): 103–105. doi:10.11362/jcssjclayscience1960.11.103.

[1] Sudoite mineral information and data Mindat

[2] Sudoite Mineral Data Webmineral

[3] Kohyama, Norihiko (2000). "In memory of Prof. Toshio Sudo". Clay Science. 11 (2): 103–105. doi:10.11362/jcssjclayscience1960.11.103.

Sudoite information

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Sudoite

Chlorite group

Vermiculite

Kaolinite

Serpentine subgroup

Talc

Biotite

Montmorillonite

Chrysotile

Phengite

List of mineral symbols

Mica

Halloysite

Lizardite

Lepidolite

Chrysocolla

Sepiolite

Antigorite

Pyrophyllite

Glauconite

Dickite

Muscovite

Phlogopite

Clay mineral

Celadonite

Cookeite

Loess Plateau

Carpholite

Nontronite

Saponite