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Chlorargyrite

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Formula:
AgCl
System:
Isometric
Colour:
Colourless (fresh); ...
Lustre:
Adamantine, Resinous, Waxy
Hardness:
1½ - 2½
Name:
In allusion to the composition, containing CHLORine and silver (Latin: ARGentum).

Classification of Chlorargyrite

Approved
3.AA.15

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 7th ed.:
9.1.4.1
9.1.4.1

9 : NORMAL HALIDES
1 : AX
8.3.1

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
3 : Halides of Ag
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Type Occurrence of Chlorargyrite

Year of Discovery:
1565

Occurrences of Chlorargyrite

Geological Setting:
Oxidized zone of silver deposits, especially in arid regions.

Physical Properties of Chlorargyrite

Adamantine, Resinous, Waxy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colourless (fresh); bright chartreuse-green, light yellow, light green, grey; becoming violet-brown on exposure to light.
Streak:
White
Hardness (Mohs):
1½ - 2½
Tenacity:
Sectile
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
5.556 g/cm3 (Measured)    5.57 g/cm3 (Calculated)

Crystallography of Chlorargyrite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 5.554Å
Unit Cell Volume:
V 171.32 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals cubic, with {111} and {011}, sometimes large, and the other reported forms as small and rare modifying faces. Often parallel or subparallel groups. Massive; crusts and waxy coatings with drusy surfaces. Wax- or horn-like masses; columnar or stalactitic; rarely fibrous.
Twinning:
On {111}.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.22 (30)
2.77 (100)
1.961 (60)
1.672 (20)
1.240 (40)
1.134 (30)
0.926 (30)

Optical Data of Chlorargyrite

Type:
Isotropic
RI values:
n = 2.071
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Very High
Type:
Isotropic

Chemical Properties of Chlorargyrite

Formula:
AgCl
Essential elements:
All elements listed in formula:
Common Impurities:
I

Relationship of Chlorargyrite to other Species

Other Members of Group:
3.AA.05MarshiteCuI
3.AA.05Miersite(Ag,Cu)I
3.AA.05NantokiteCuCl
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgI
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBr
3.AA.20CarobbiiteKF
3.AA.20GriceiteLiF
3.AA.20HaliteNaCl
3.AA.20SylviteKCl
3.AA.20VilliaumiteNaF
3.AA.25SalammoniacNH4Cl
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)
3.AA.30Calomel(Hg22+)Cl2
3.AA.30Kuzminite(Hg22+)(Br,Cl)2
3.AA.30Moschelite(Hg22+)I2
3.AA.35NeighboriteNaMgF3
3.AA.40ChlorocalciteKCaCl3
3.AA.45KolaritePbTeCl2
3.AA.50RadhakrishnaitePbTe3(Cl,S)2
3.AA.55ChallacolloiteKPb2Cl5
3.AA.60HephaistositeTlPb2Cl5

Other Names for Chlorargyrite

Other Information

Thermal Behaviour:
Melts at 455°.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Ore of silver

References for Chlorargyrite

Reference List:
Prior and Spencer (1902) Mineralogical Magazine: 13: 174.

Schrader, Stone, and Sanford (1917), USGS Bulletin 624.

Pabst (1938), California State Division of Mines Bulletin 113: 88.

Mott and Gurney (1940), Electronic Proc. in Ionic Crystals, Oxford.

Galbraith (1941), University of Arizona Bulletin 149: 24.

Gianella (1941), University of nevada Bulletin, Geology series 36: 56.

Northrop (1942), University of New Mexico Bulletin 6, no. 1: 103.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 11-15.

Internet Links for Chlorargyrite

Specimens:
The following Chlorargyrite specimens are currently listed for sale on minfind.com.

Localities for Chlorargyrite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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