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Chlorargyrite

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Formula:
AgCl
System:IsometricColour:Colourless (fresh); ...
Lustre:Adamantine, Resinous, WaxyHardness:1½ - 2½
Member of:Chlorargyrite Group
Name:In allusion to the composition, containing CHLORine and silver (Latin: ARGentum).

Classification of Chlorargyrite

IMA status:Approved
Strunz 8th edition ID:3/A.02-50
Nickel-Strunz 10th (pending) edition ID:3.AA.15

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 7th edition ID:9.1.4.1
Dana 8th edition ID:9.1.4.1

9 : NORMAL HALIDES
1 : AX
Hey's CIM Ref.: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

Type Locality:Marienberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1565

Occurrences of Chlorargyrite

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

Physical Properties of Chlorargyrite

Lustre: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 (measured):5.556 g/cm3
Density (calculated):5.57 g/cm3

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:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction:
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
Maximum Birefringence:δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:Very High
Type:Isotropic

Chemical Properties of Chlorargyrite

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

Relationship of Chlorargyrite to other Species

Member of:Chlorargyrite Group
Other Members of Group:

- +
Common Associates:
WulfeniteWadSilverPyromorphiteMalachite
LimoniteJarositeIodargyriteCerussiteBromargyrite
Atacamite
Related Minerals - Nickel-Strunz Grouping):

- +
3.AA.05Marshite
CuI
3.AA.05Miersite
(Ag,Cu)I
3.AA.05Nantokite
CuCl
3.AA.05UM1999-11:I:CuS
Cu(I,S)
3.AA.10Iodargyrite
AgI
3.AA.10Tocornalite
(Ag,Hg)I
3.AA.15Bromargyrite
AgBr
3.AA.20Carobbiite
KF
3.AA.20Griceite
LiF
3.AA.20Halite
NaCl
3.AA.20Sylvite
KCl
3.AA.20Villiaumite
NaF
3.AA.25Salammoniac
NH
 
4
Cl
3.AA.25UM1998-03-Cl:Tl
TlCl
3.AA.25Lafossaite
Tl(Cl,Br)
3.AA.30Calomel
(Hg
+
2
)Cl
 
2
3.AA.30Kuzminite
(Hg
+
2
)(Br,Cl)
 
2
3.AA.30Moschelite
(Hg
+
2
)I
 
2
3.AA.35Neighborite
NaMgF
 
3
3.AA.40Chlorocalcite
KCaCl
 
3
3.AA.45Kolarite
PbTeCl
 
2
3.AA.50Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
3.AA.55Challacolloite
KPb
 
2
Cl
 
5
3.AA.60Hephaistosite
TlPb
 
2
Cl
 
5
Related Minerals - Hey's Index Grouping:

- +
8.3.2Bromargyrite
AgBr
8.3.3Bromian Chlorargyrite
Ag(Cl,Br)
8.3.4Iodargyrite
AgI
8.3.5Miersite
(Ag,Cu)I

Other Names for Chlorargyrite

Synonyms:
ArgyroceratiteCerargeriteCerargyriteCerargyritesCorneous Silver
Horn SilverKerargyriteKerateMuriate of SilverOstwaldite
Other Languages:
French:Argent corné
Argent muriaté
Chlorure d'argent
Kerargyre
German:Argyroceratit
Cerargerit
Cerargyrit
Chlorargyrit
Chlorsilber
Chlorsilberspath
Hornerz
Hornfarbs-Silber
Hornsilber
Kerat
Ostwaldit
Silberhornerz
Silberhornspath
Silber-Kerat
Silberspath
Italian:Argent cornea
Cherargirio
Latin:Argento sulphure et arsenico mineralisatum
Argentum cornu pellucido simile
Minera argenti cornea
Russian:Хлораргирит
Simplified Chinese:角银矿
Spanish:Argyroceratita
Cerargerita
Cerargyrita
Clorargirita
Ostwaldita
Plata cornea
Swedish:Chlorsilfver
Horn-Silfver
Silfverhornmalm
Varieties:
Bromian ChlorargyriteButtermilcherzIodian Bromian Chlorargyrite

Other Information

Fluorescence in UV light:None.
Thermal Behaviour:Melts at 455°.
Health Warning: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

Search Engines:
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  • Look for Chlorargyrite on Wikipedia
  • Look for Chlorargyrite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Chlorargyrite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • SpiriferMinerals.com - high quality low prices
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  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Rare and Unusual minerals at Mineralogical Research Company
  • Specimens:The following Chlorargyrite specimens are currently listed for sale on minfind.com.

    Localities for Chlorargyrite

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