Salammoniac Mineral Data
General Salammoniac Information
Chemical Formula:
NH4Cl
Composition:
Molecular Weight = 53.49 gm
Hydrogen 7.54 % H - % Calc as (NH4 )2 O
Nitrogen 26.19 % N 48.68 % (NH4 )2 O
Chlorine 66.28 % Cl 66.28 % Cl
- % Cl -14.96 % -O=Cl2
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
(NH4 )Cl
Environment:
Volcanic fumaroles, burning coal seams and quano deposits.
IMA Status:
Valid Species (Pre-IMA) 1546
Locality:
Etna, Vesuvius, Italy Link to MinDat.org Location Data.
Name Origin:
Alchemist's Latin name for "salt of Ammon", used by early writers for common rock salt from near the Oracle of Ammon in Egypt.
Name Pronunciation:
Salammoniac + Pronunciation
Synonym:
Sal Ammoniac - Renamed to Salammoniac by Mineralogical Record, v39 (2008), p131
Salmiac
Salammoniac Image
Images:
Salammoniac
Comments: Network of white or slightly grayish sal-ammoniac crystals with some sulfur.
Location: Ravat, Tien Shan Mtns, Central Tajikistan.
Scale: 6 x 4 x 3 cm.
© John Attard
Images:
Erythrosiderite Salammoniac
Comments: Orange-brown aggregates of erythrosiderite with sal ammoniac. Material from the 1926 eruption of the Erythrosiderite is hygroscopic and must be stored in a closed vial. The photo was made through the vial.
Location: Vesuvius, Naples Province, Campania, Italy.
Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag
Salammoniac Crystallography
Cell Dimensions:
a = 3.8758, Z = 1; V = 58.22 Den(Calc)= 1.53
Crystal System:
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m
X Ray Diffraction:
By Intensity(I/Io ): 2.74(1), 1.582(0.25), 3.87(0.25),
Forms:
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( 1 2 3)
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Physical Properties of Salammoniac
Cleavage:
{???} Poor, {???} Poor, {???} Poor
Color:
Colorless, White, Grayish, Yellow, Brown.
Density:
1.5
Diaphaneity:
Transparent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Hardness:
1.5-2 - Talc-Gypsum
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Salammoniac
Optical Data:
Isotropic, n=1.693.
Calculated Properties of Salammoniac
Electron Density:
Bulk Density (Electron Density)=1.60 gm/cc note: Specific Gravity of Salammoniac =1.53 gm/cc.
Fermion Index:
Fermion Index = 0.26 Boson Index = 0.74
Photoelectric:
PESalammoniac = 4.15 barns/electronU=PESalammoniac x r Electron Density= 6.65 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Salammoniac is Not Radioactive
Salammoniac Classification
Dana Class:
09.01.03.01 (09) Anhydrous and Hydrated Halides
(09.01) where A X
(09.01.03) Dana Group
09.01.03.01 Salammoniac NH4Cl P m3m 4/m 3 2/m
09.01.03.02 Lafossaite ! Tl(Cl,Br) P m3m 4/m 3 2/m
Strunz Class:
03.AA.25 03 - HALIDES
03.A - Simple Halides, Without H2O
03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.25 Salammoniac NH4Cl P m3m 4/m 3 2/m
03.AA.25 Lafossaite ! Tl(Cl,Br) P m3m 4/m 3 2/m
Other Salammoniac Information
References:
NAME( Dana8) PHYS. PROP.(Dana's Sys. of Min.,7th ed.,Vol.2,1951) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Salammoniac :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST
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Print or Cut-and-Paste your Salammoniac Specimen Label here :
Salammoniac
NH4Cl
Dana No: 09.01.03.01 Strunz No: 03.AA.25
Locality:
Notes: