Ammonioleucite Mineral Data
General Ammonioleucite Information
Chemical Formula:
(NH4,K)AlSi2O6
Composition:
Molecular Weight = 202.45 gm
Potassium 4.83 % K 5.82 % K2 O
Aluminum 13.33 % Al 25.18 % Al2 O3
Silicon 27.75 % Si 59.36 % SiO2
Hydrogen 1.49 % H - % Calc as (NH4 )2 O
Nitrogen 5.19 % N 9.65 % (NH4 )2 O
Oxygen 47.42 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
(NH4 )0.75 K0.25 AlSi2 O6
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 - Dipyramidal H-M Symbol (4/m) Space Group: I 41 /a
X Ray Diffraction:
By Intensity(I/Io ): 5.43(1), 3.3(0.8), 5.53(0.5),
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:
PEAmmonioleucite = 1.93 barns/electronU=PEAmmonioleucite 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 21 3 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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Ammonioleucite
(NH4,K)AlSi2O6
Dana No: 76.02.02.02 Strunz No: 09.GB.05
Locality:
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