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Masutomilite (Masutomilith)

Pictures (3 Images total)

Masutomilith
Views (File:
1469974141
): 900
Masutomilith
von Hirukawa, Nakatsugawa, Chubu, Honshu, Japan; blättrig hellbraun; BB = 12,2 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A002 482, Donator: Klaus Fleck
Location: Japan/Honshū (Honschu), Insel/Chūbu (Chubu), Region/Gifu, Präfektur/Nakatsugawa, Stadt/Hirukawa
Mineral: Masutomilite
Image: 1469974141
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Masutomilith (SNr: A002 482)

von Hirukawa, Nakatsugawa, Chubu, Honshu, Japan; blättrig hellbraun; BB = 12,2 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2016-07-31
Locality: Hirukawa / Nakatsugawa, Stadt / Gifu, Präfektur / Chūbu (Chubu), Region / Honshū (Honschu), Insel / Japan
Zinnwaldit (grau), Masutomilit (lila), Lepidolith (rötlich)
Views (File:
1279875643
): 2416
Zinnwaldit (grau), Masutomilit (lila), Lepidolith (rötlich)
zonierter Kristall; Größe: 65x55x08 mm; Fundort: Mokrusha, Alabashka-Pegmatit, Yuzhakovo, Swerdlowsk Oblast, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Ural, Föderationskreis/Swerdlowsk, Oblast (Sverdlovskaya)/Yuzhakovo/Alabashka-Pegmatitfeld/Mokrusha
Mineral: Lepidolite, Masutomilite, Zinnwaldite
Image: 1279875643
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Zinnwaldit (grau), Masutomilit (lila), Lepidolith (rötlich)

zonierter Kristall; Größe: 65x55x08 mm; Fundort: Mokrusha, Alabashka-Pegmatit, Yuzhakovo, Swerdlowsk Oblast, Russland
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2010-07-23
Locality: Mokrusha / Alabashka-Pegmatitfeld / Yuzhakovo / Swerdlowsk, Oblast (Sverdlovskaya) / Ural, Föderationskreis / Russland
Masutomilith
Views (File:
1281735219
): 1120
Masutomilith
Größe: 4,8 x 3,7 x 1,3 cm, Fundort: Sawtooth, Boise Co., Idaho, USA
Copyright: Dan Weinrich; Contribution: thdun5
Location: USA/Idaho/Boise Co./Sawtooth Batholith
Mineral: Masutomilite
Image: 1281735219
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Masutomilith

Größe: 4,8 x 3,7 x 1,3 cm, Fundort: Sawtooth, Boise Co., Idaho, USA
Copyright: Dan Weinrich
Contribution: thdun5 2010-08-13
Locality: Sawtooth Batholith / Boise Co. / Idaho / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color purpurfarben rosa
Streak color weiß
Hardness (Mohs) 2.5
Cleavages vollkommen {001}
Crystal System monoklin, C2

Chemism

Chemical formula

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

Chemical composition

Aluminium, Lithium, Mangan, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 400.590990925 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

K(Li0.6Al0.3Mn0.1)3(Si0.75Al0.25)4O10(F0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.13

0.5

2.44

1.0079470

0.5039735
Lithium

Li

3.12

1.8

8.78

6.9412000

12.4941600
Oxygen

O

41.94

10.5

51.22

15.9994300

167.9940150
Fluorine

F

7.11

1.5

7.32

18.9984033

28.4976049
Aluminium

Al

12.80

1.9

9.27

26.9815382

51.2649226
Silicon

Si

21.03

3

14.63

28.0855300

84.2565900
Potassium

K

9.76

1

4.88

39.0983100

39.0983100
Manganese

Mn

4.11

0.3

1.46

54.9380499

16.4814150

Analysis wt%

SiO2 : 46.85, Al2O3 : 19.81, FeO : 1.53, MnO : 8.12, Li2O : 4.45, Na2O : 0.54, K2O : 9.88, Rb2O : 1.54, F : 7.04, H2O : 2.63 (Ref: Min.J.Jap.86)

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.11-060

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.210

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

purpurfarben rosa

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.036
Birefringence chart\! Masutomilite title=Birefringence chart Masutomilite

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

1.534

RI value β

1.569

RI value γ / ε

1.570

Ri mean

1.558

2V angle

Biaxial (-) 28° - 35° (gemessen)

Orientation

Y = b; Z ^ a = 2° -4°

Dispersion

sehr schwach, r > v

Absorption

Y > Z > X

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

5

Space Group

C2

Cell parameters a (Å)

5.252

Cell parameters b (Å)

9.065

Cell parameters c (Å)

10.107

Cell parameters a/b or c/a

0.579

Cell parameters c/b

1.115

Cell parameters α

90°

Cell parameters β

100.48

Cell parameters γ

90°

Z

2

Volume (ų)

473.161

X-Ray Powder Diffraction

10.10(70),
4.99(30),
3.64(40),
3.35(60),
3.32(100),
3.09(60),
2.903(30),
1.989(50)
XRD chart Masutomilite

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)

2.94

2.812 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

(Co-)Type locality

(Co-)Type locality

Japan/Honshū (Honschu), Insel/Kinki, Region (Kansai Zweckverband)/Shiga, Präfektur/Otsu/Tanakamiyama

Type material

Kanazawa University, Kanazawa; Tohoku University, Kawauchi, Japan

Preface

Name from

Dr. Kazunosuke Masutomi, Japanischer Amateur-Mineraloge

Author (Name, Year)

Harada & Nagashima & Kanisawa, 1976

References

Mineralogical Journal (Tokyo) 8 (1976), 95

IMA group assignments

Other languages

Spanish

Masutomilita

English

Masutomilite

French

Masutomilite

German

Masutomilith

Russian

Масутомилит

Japanese

益富雲母　

Alternative Name

German

Masutomilit

CNMNC symbol

Symbol

Msu

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Ns-gg1rzuUKImzI8I3FPEg
GUID (Global unique identifier) 83A0CF36-F35A-42B9-889B-323C23714F12
Database ID 2405