http://www.spessartit.de/walldorf.html
https://www.mineraliengrosshandel.com
https://www.mineralbox.biz
https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
'._('einklappen').'
 

Yamatoite (Yamatoit)

Additional Functions


You find additional Yamatoit specimen at the Geolitho Museum

Collectors Summary

Color honiggelb, dunkelrot
Streak color weiß
Hardness (Mohs) 6 - 7
Cleavages fehlt
Crystal System kubisch,
Morphology kubisch

Chemism

Chemical formula

(Mn2+,Ca)3(V3+,Al)2(SiO4)3

Chemical composition

Aluminium, Calcium, Mangan, Silicium, Sauerstoff, Vanadium

Unit weight: 519.822196375 u; Number of atoms in the formula: 20

Info

Empirical formula:

(Mn0.75Ca0.25)3(V0.75Al0.25)2(SiO4)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

36.93

12

60.00

15.9994300

191.9931600
Aluminium

Al

2.60

0.5

2.50

26.9815382

13.4907691
Silicon

Si

16.21

3

15.00

28.0855300

84.2565900
Calcium

Ca

5.78

0.75

3.75

40.0784000

30.0588000
Vanadium

V

14.70

1.5

7.50

50.9415100

76.4122650
Manganese

Mn

23.78

2.25

11.25

54.9380499

123.6106123

IMA status

Diskreditiert von der CNMNC, da es sich bei dem beschriebenen Material von der Yamato-Grube (TL) um Momoiit handelt.

Optical Properties

Color

honiggelb, dunkelrot

Streak color

weiß

Crystallography

Crystal System

kubisch

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Morphology

kubisch

Physical Properties

Hardness (Mohs)

6 - 7

Cleavages

fehlt

Preface

Author (Name, Year)

Yoshimura & Momoi, 1964

References

American Mineralogist 50 (1965), 810.

Mineralogical Magazine 36 (1967), 133.

Other languages

German

Yamatoit

Spanish

Yamatoita

English

Yamatoite

French

Yamatoite