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Ammonioleucite

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Ammonioleucit
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Ammonioleucit

farblose, isometrische Kristalle von Ammonioleucit, Tatarazawa, Gunma, Honshu, Japan; BB siehe Aufnahme

Copyright: Joy Desor
Contribution: openpit 2021-05-22
Locality: Tatarazawa / Gunma, Präfektur / Kanto, Region / Honshu / Japan

Collectors Summary

Color weiß
Streak color weiß
Lustre Glasglanz, Harzglanz
Hardness (Mohs) 5.00 - 5.50
Crystal System tetragonal, I41/a
Morphology Kristalle bis 3 mm Größe.

Chemism

Chem­ical formula

(NH4)(AlSi2O6)

Chem­ical com­po­si­tion

Aluminium, Silicium, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 197.1876862 u; Number of atoms in the formula: 14

Info

Empirical formula:

(NH4)(AlSi2O6)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.04

4

28.57

1.0079470

4.0317880

Nitrogen

N

7.10

1

7.14

14.0067200

14.0067200

Oxygen

O

48.68

6

42.86

15.9994300

95.9965800

Aluminium

Al

13.68

1

7.14

26.9815382

26.9815382

Silicon

Si

28.49

2

14.29

28.0855300

56.1710600

Strunz 9th edi­tion incl. updates

9.GB.05

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
B: Ketten von einfach verbundenen vierer-Ringen
05:Analcim-Gruppe

Lapis Clas­sifica­tion

VIII/J.05-020

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
5: Ohne tetraederfremde Anionen

Clas­sifica­tion by Hölzel

9.FB.120

9: SILICATES
F: Tektosilicates
B: Leucite-Group

Hey's Chem­ical Index of Min­er­als

16.05.04

16: Silicates Containing Aluminum and other Metals
05: Aluminosilicates of Cs, NH4 and Cu

Dana 8th edi­tion

76.02.02.02

76: Tektosilicates Tectosilicate Al-Si Framework
02: Tektosilicates Tectosilicate Al-Si Framework Feldspathoids and related species
02: Leucite group

IMA sta­tus

anerkannt 1984

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Zeolite group  ⇒ ANA zeolite structure group

Optical Properties

Color

weiß

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

Glasglanz, Harzglanz

max. Birefrin­gence

v.nicht wahrnehmbar

RI value α / ω / n

1.518

RI value β

1.518

RI value γ / ε

1.518

Ri mean

1.518

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/m

Space Group number

88

Space Group

I41/a

Cell param­e­ters a (Å)

13.214

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

13.713

Cell param­e­ters a/b or c/a

1.038

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

16

Volumne (ų)

2394.424

Kristall struc­ture

4er-Ring-Ketten, gewunden um Prismen, bilden Käfige ähnlich doppelten 6er-Ringen

X-Ray Pow­der Diffrac­tion

5.43 (100), 3.30 (80), 5.53 (50), 3.43 (40), 2.955 (20), 2.859(20), 2.839 (10)

Morphol­ogy

Kristalle bis 3 mm Größe.

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.00 - 5.50

VHN (Hard­ness Vick­ers)

470 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.29

2.188 ( ρ calc. Mineralienatlas )

Radioac­tiv­ity

Radioaktivität von Ammonioleucit kaum nachweisbar.

(Co-)Type locality

(Co-)Type locality

Japan/Honshu/Kanto, Region/Gunma, Präfektur/Tatarazawa

Type mate­r­ial

Das Typmaterial befindet sich im Nationalen Wissenschafts Museum in Tokyo, Japan und im nationalen Naturkundemuseum von Washington DC.

Preface

Occurrences

Auf Klüften und in Hohlräumen in einem grünen, dolomitisierten, kristallinen Schiefer des Sankagawa Gürtels mit metamorphen Gesteinen.

Asso­cia­tions

Analcim, Dolomit

Rare­ness

sehr selten

Name from

Nach der chemischen Zusammensetzung und der Verwandtschaft zu Leucit.

Author (Name, Year)

Hori & Nagashima & Yamada & Miyawaki & Marubashi, 1986

References

American Mineralogist 71 (1986), 1022

HORI H., NAGASHIMA K., YAMADA M., MIYAWAKI R. & MARUBASHI T. (1986): Ammonioleucite, a new mineral from Tatarazawa, Fujioka, Japan. - Am. Mineral., 71: S. 1022 - 1027.

CNMNC Newsletter No. 50; Mineralogical Magazine Vol. 83, Nr. 4 (2019) S. 620 [Formel]

IMA group assignments



 
 
 
(NH4)(AlSi2O6)
tetragonal
I41/a

 
 
 
Na(Si2Al)O6·H2O
orthorhombisch
Ibca

 
 
 
Ca3Li2Be3(SiO4)3F2
kubisch
I213

 
 
 
CsBSi2O6
tetragonal
I41/acd

 
 
 
K(AlSi2)O6
tetragonal
I41/a

 
 
 
(Cs,Na)(Si2Al)O6·nH2O
kubisch
Ia3d

 
 
 
CaAl2Si4O12·2H2O
monoklin
I2/a

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Actuality: 18. Jun 2022 - 11:46:38

Other languages

German

Ammonioleucit

French

Ammonioleucite

English

Ammonioleucite

Spanish

Amonioleucita

Russian

Аммониолейцит

Japanese

アンモニオ白榴石

Alternative Name

Spanish

Ammonioleucita

CNMNC symbol

Symbol

Alct

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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RRUFF - References and PDF downloads - search for: Ammonioleucite
American-Mineralogist-Crystal-Structure-Database - search for: Ammonioleucite
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Russian pages

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German pages

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