Salammoniac Mineral Data

General Salammoniac Information

Chemical Formula:

NH4Cl

Composition:

Molecular Weight = 53.49 gm

Hydrogen 7.54 % H - % Calc as (NH₄)₂O

Nitrogen 26.19 % N 48.68 % (NH₄)₂O

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:

Salammoniac Erythrosiderite

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 - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

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

By Intensity(I/I_o): 2.74(1), 1.582(0.25), 3.87(0.25),

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Forms: ( 1 2 3) ( 0 1 1) ( 1 1 2)

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Crystal Structure:

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Sirdeshmukh D B , Deshpande V T , Acta Crystallographica, Section A , 26 (1970) p.295-295, X-ray measurement of the thermal expansion of ammonium chloride, Locality: synthetic, Sample: T = 54.0 C

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:

PE_Salammoniac= 4.15 barns/electron
U=PE_Salammoniac x rElectron 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: