Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Luzonite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Cu3AsS4
System:
Tetragonal
Colour:
Deep pinkish-brown
Lustre:
Metallic
Hardness:
Member of:
Name:
Named in 1874 after the type locality, Mancayan, Luzon, Philippines.
Dimorph of:
Luzonite-Famatinite Series.

Originally thought to be enargite or, in part, a mixture of enargite with famatinite, or famatinite.

Usually found as massively crystalline to granular material, deep pinkish-brown in color. Crystals very rare, small, and equant (pseudo-octahedral) in habit.

Classification of Luzonite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.KA.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
K : Sulfarsenates, Sulfantimonates
A : Sulfarsenates with (As,Sb)S4 tetrahedra
Dana 7th ed.:
3.2.2.1
3.2.2.1

3 : SULFOSALTS
2 : ø = 4
6.3.2

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
3 : Sulpharsenates and sulphantimonates
mindat.org URL:
http://www.mindat.org/min-2461.html
Please feel free to link to this page.

First Recorded Occurrence of Luzonite

Year of Discovery:
1874

Occurrences of Luzonite

Geological Setting:
A primary mineral of copper deposits, such as at Sierra de Famatina, Argentina.

Physical Properties of Luzonite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Deep pinkish-brown
Streak:
Black.
Hardness (Mohs):
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {101}, distinct on {100}.
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.4 - 4.6 g/cm3 (Measured)    4.47 g/cm3 (Calculated)

Crystallography of Luzonite

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2m
Cell Parameters:
a = 5.29Å, c = 10.465Å
Ratio:
a:c = 1 : 1.978
Unit Cell Volume:
V 292.85 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Usually massively crystalline to granular, crystals rare and small, usually equant.
Twinning:
Twinned on {112}.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.05(100)
1.86(90)
1.59(70)
1.58(60)
1.32(50)
1.20(60)
1.08(60)
1.07(50)

Chemical Properties of Luzonite

Formula:
Cu3AsS4
Essential elements:
All elements listed in formula:
Common Impurities:
Sb

Relationship of Luzonite to other Species

Series:
Forms a series with Famatinite (see here)
Member of:
Other Members of Group:
BriartiteCu2(Fe,Zn)GeS4
ČernýiteCu2(Cd,Zn,Fe)SnS4
FamatiniteCu3SbS4
FerrokësteriteCu2(Fe,Zn)SnS4
Ge-stannoiditeCu8Fe2ZnGe2S12
HocartiteAg2(Fe2+,Zn)SnS4
KësteriteCu2(Zn,Fe)SnS4
Kësterite Subgroup
KeutschiteCu2AgAsS4
KuramiteCu3SnS4
PermingeatiteCu3SbSe4
Petrukite(Cu,Fe,Zn,Ag)3(Sn,In)S4
PirquitasiteAg2ZnSnS4
StanniteCu2(Fe,Zn)SnS4
VelikiteCu2HgSnS4
2.KA.05EnargiteCu3AsS4
2.KA.05Petrukite(Cu,Fe,Zn,Ag)3(Sn,In)S4
2.KA.10BriartiteCu2(Fe,Zn)GeS4
2.KA.10FamatiniteCu3SbS4
2.KA.10PermingeatiteCu3SbSe4
2.KA.10BarquilliteCu2CdGeS4
2.KA.15FangiteTl3AsS4

Other Names for Luzonite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Luzonite

Reference List:
Zerrenner (1869), B.H. Ztg.: 106.

Weisbach (1874) Min. Mitt.: 257.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 391.

American Mineralogist (1957): 42: 766-779.

Zeitschrift für Kristallographie (1967): 124: 1.

Tanelli G. (1970) - Ricerche sui minerali del gruppo dell'enargite (enargite, stibioenargite, luzonite, famatinite, stibioluzonite). Periodico di mineralogia – Roma, pp. 561-583.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig, Vandall T. King (1997, Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 156.

Pósfai, M. & Buseck, P. (1998): Stacking disorder and polytypism in enargite and luzonite. American Mineralogist, 83, 365-372.

Pósfai, M. & Buseck, P. (1998): Relationships between microstructure and composition in enargite and luzonite. American Mineralogist, 83, 373–382. [http://www.minsocam.org/msa/ammin/toc/Articles_Free/1998/Posfai_p373-382_98.pdf]

Internet Links for Luzonite

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

Localities for Luzonite

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  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 2, 2015 04:16:16 Page generated: March 30, 2015 14:25:07