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Ammonioleucite

Big Photo

Tatarazawa, Fujioka, Gunma Prefecture, Kanto Region, Honshu Island, Japan
© Knut Eldjarn

Formula:
(NH
 
4
,K)AlSi
 
2
O
 
6
System:TetragonalColour:White
Hardness:5½ - 6
Name:For the chemical composition and the relationship with leucite.


Replacement of analcime crystals.

Classification of Ammonioleucite

IMA status:Approved
Strunz 8th edition ID:8/J.05-20
Nickel-Strunz 10th (pending) edition ID:9.GB.05

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
Dana 8th edition ID:76.2.2.2

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
Hey's CIM Ref.:16.5.4

16 : Silicates Containing Aluminum and other Metals
5 : Aluminosilicates of Cs, NH4 and Cu
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Type Occurrence of Ammonioleucite

Type Locality:Tatarazawa, Fujioka, Gunma Prefecture, Kanto Region, Honshu Island, Japan
Year of Discovery:1986
Geological Setting of type material:Cavities in a hydrothermally altered greenschist
Associated Minerals at type locality:
Analcime

Physical Properties of Ammonioleucite

Lustre:Vitreous, Resinous
Diaphaneity (Transparency):Translucent
Colour:White
Hardness (Mohs):5½ - 6
Density (measured):2.29 g/cm3
Density (calculated):2.24 g/cm3

Crystallography of Ammonioleucite

Crystal System:Tetragonal
Cell Parameters:a = 13.21Å, c = 13.71Å
Ratio:a:c = 1 : 1.038
Unit Cell Volume:V 2,392.45 ų (Calculated from Unit Cell)
Twinning:All twinned parallel to either a or b.

Optical Data of Ammonioleucite

Type:Uniaxial (+)
RI values: nω = 1.518 nε = 1.518
Maximum Birefringence:δ = 0.000

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Ammonioleucite

Formula:
(NH
 
4
,K)AlSi
 
2
O
 
6
Essential elements:Al, H, N, O, Si
All elements listed in formula:Al, H, K, N, O, Si

Relationship of Ammonioleucite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GB.05Analcime
Na
 
2
[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.05Hsianghualite
Ca
 
3
Li
 
2
Be
 
3
[F
 
2
|(SiO
 
4
)
 
3
]
9.GB.05Lithosite
K
 
6
Al
 
4
Si
 
8
O
 
25
·2H
 
2
O
9.GB.05Leucite
KAlSi
 
2
O
 
6
9.GB.05Pollucite
(Cs,Na)
 
2
[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.05Wairakite
Ca[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
9.GB.10Laumontite
CaAl
 
2
Si
 
4
O
 
12
·4H
 
2
O
9.GB.15Yugawaralite
CaAl
 
2
Si
 
6
O
 
16
·4H
 
2
O
9.GB.20Roggianite
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
·2.5H
 
2
O
9.GB.25Goosecreekite
Ca[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O
9.GB.30Montesommaite
(K,Na)
 
9
Al
 
9
Si
 
23
O
 
64
·10H
 
2
O
9.GB.35Parthéite
CaAl
 
2
Si
 
2
O
 
8
·2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.5.1Pollucite
(Cs,Na)
 
2
[Al
 
2
Si
 
4
O
 
12
] · 2H
 
2
O
16.5.2Nanpingite
CsAl
 
2
[(OH,F)
 
2
|AlSi
 
3
O
 
10
]
16.5.3Buddingtonite
(NH
 
4
)[AlSi
 
3
O
 
8
]
16.5.5Tobelite
(NH
 
4
,K)Al
 
2
[(OH)
 
2
|AlSi
 
3
O
 
10
]
16.5.6Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
16.5.7Papagoite
CaCu[H
 
3
AlSi
 
2
O
 
9
]

Other Names for Ammonioleucite

Other Languages:
German:Ammonioleucit
Russian:Аммониолейцит
Spanish:Ammonioleucita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ammonioleucite

Reference List:American Mineralogist: 71: 1022-1027.

Mineralogical Record: 30: 5-6.

Mineralogical Journal: 20: 105-112.

Internet Links for Ammonioleucite

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  • Raman and XRD data at RRUFF project
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    Localities for Ammonioleucite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Gunma Prefecture
    		The Mineral Species of Japan (5th ed) Matsubara
    American Mineralogist (1986): 71, 1022-1027.
    Mineral and/or Locality
    Google
     
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