Ammonioleucite Mineral Data

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General Ammonioleucite Information

Chemical Formula:

(NH4,K)AlSi2O6

Composition:

Molecular Weight = 202.45 gm

Potassium 4.83 % K 5.82 % K₂O

Aluminum 13.33 % Al 25.18 % Al₂O₃

Silicon 27.75 % Si 59.36 % SiO₂

Hydrogen 1.49 % H - % Calc as (NH₄)₂O

Nitrogen 5.19 % N 9.65 % (NH₄)₂O

Oxygen 47.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(NH₄)_0.75K_0.25AlSi₂O₆

Environment:

In veinlets, fractures, and cavities in hydrothermally altered crystalline schist, as powdery pseudomorphous replacements of analcime crystals.

IMA Status:

Approved IMA 1984

Locality:

In the Tatarazawa quarry, Fujioka, Gumma Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

For "ammonia" in its chemical composition and its relation to "leucite."

Name Pronunciation:

Ammonioleucite + Pronunciation

Synonym:

ICSD 54162

PDF 40-474

Ammonioleucite Image

Images:

Ammonioleucite

Comments: White powdery ammonioleucite associated with colorless analcime.
Location: Tatarazawa Quarry, Fujioka Gunma Prefecture, Hunho Island, Japan. Scale: See Image.
© Rruff Database

Ammonioleucite Crystallography

Axial Ratios:

a:c = 1:1.03776

Cell Dimensions:

a = 13.214, c = 13.713, Z = 16; V = 2,394.42 Den(Calc)= 2.25

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.43(1), 3.3(0.8), 5.53(0.5),

Crystal Structure:

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Yamada M , Miyawaki R , Nakai I , Izumi F , Nagashima K , Mineralogical Journal , 20 (1998) p.105-112, A Rietveld analysis of the crystal structure of ammonioleucite

Physical Properties of Ammonioleucite

Color:

White.

Density:

2.29

Diaphaneity:

Translucent

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Ammonioleucite

Gladstone-Dale:

CI meas= -0.21 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.231 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2302,KPDmeas= 0.2262,KC= 0.187
Ncalc = 1.42 - 1.43

Optical Data:

Uniaxial (+), w=1.518, e=1.518, bire=0.0000.

Calculated Properties of Ammonioleucite

Electron Density:

Bulk Density (Electron Density)=2.31 gm/cc
note: Specific Gravity of Ammonioleucite =2.29 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Ammonioleucite}= 1.93 barns/electron
U=PE_{Ammonioleucite} x r_electron= 4.46 barns/cc.

Radioactivity:

GRapi = 70.20 (Gamma Ray American Petroleum Institute Units)
Concentration of Ammonioleucite per GRapi unit = 1.42 (%)

Estimated Radioactivity from Ammonioleucite - barely detectable

Ammonioleucite Classification

Dana Class:

76.02.02.02 (76)Tectosilicate Al-Si Framework

(76.02)Feldspathoids and related species

(76.02.02)Leucite group

76.02.02.01 Leucite KAlSi2O6 I 4₁/a 4/m

76.02.02.02 Ammonioleucite (NH4,K)AlSi2O6 I 4₁/a 4/m

Strunz Class:

09.GB.05 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GB -Chains of single connected 4-membered rings

09.GB.05 Ammonioleucite (NH4,K)AlSi2O6 I 4₁/a 4/m

09.GB.05 Analcime NaAlSi2O6•(H2O) P1 1

09.GB.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 2₁3 2 3

09.GB.05 Lithosite K6Al4Si8O25•(H2O) P 2₁ (pseudo ORTH) 2

09.GB.05 Leucite KAlSi2O6 I 4₁/a 4/m

09.GB.05 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m

09.GB.05 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m

Other Ammonioleucite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.71,p1022-1027,1986) OPTIC PROP.(Am.Min.,Vol.71,p1022-1027,1986)

See Also:

Links to other databases for Ammonioleucite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Ammonioleucite Specimen Label here :

Ammonioleucite

(NH4,K)AlSi2O6
Dana No: 76.02.02.02 Strunz No: 09.GB.05
Locality:

Notes: