Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Selenojalpaite

Formula:
Ag
 
3
CuSe
 
2
System:TetragonalColour:Dark grey
Hardness:4 - 4½
This page provides mineralogical data about Selenojalpaite.

Classification of Selenojalpaite

IMA status:Approved 2004
Strunz 8th edition ID:2/B.06-15
Nickel-Strunz 10th (pending) edition ID:2.BA.45

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
mindat.org URL:http://www.mindat.org/min-27493.html
Please feel free to link to this page.

Type Occurrence of Selenojalpaite

Type Locality:Skrikerum Mine, Valdemarsvik, Östergötland, Sweden
General Appearance of Type Material:anhedral to subhedral grains up to 200 µm across
Associated Minerals at type locality:
EucairiteChalcopyriteBerzelianiteAltaite

Physical Properties of Selenojalpaite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Dark grey
Streak:Black
Hardness (Mohs):4 - 4½
Hardness (Vickers):VHN25=36 - 40 kg/mm2
Tenacity:Brittle
Fracture:Irregular/Uneven
Density (calculated):7.64 g/cm3

Crystallography of Selenojalpaite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:I41/amd (I41/a 2/m 2/d)
Cell Parameters:a = 8.939Å, c = 11.844Å
Ratio:a:c = 1 : 1.325
Unit Cell Volume:V 946.4 ų
Z:8
X-Ray Powder Diffraction:
d-spacingIntensity
4.47 (60)
2.891 (85)
2.813 (80)
2.473 (75)
2.426 (100)
2.162 (70)
Comments:Format: d/A (I/%) (hkl)
From type description

Optical Data of Selenojalpaite

Type:Anisotropic
Bireflectance:Weakly to moderately bireflectant
Reflectivity:
471.1 nmR1=33.5%R2= 37.1%
548.3 nmR1=31.8%R2= 35.1%
586.6 nmR1=30.4%R2= 34.0%
652.3 nmR1=29.3%R2= 32.4%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 37.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:Light grey
Internal Reflections:None
Pleochroism:Weak
Comments:Brownish grey to slightly darker greenish grey

Chemical Properties of Selenojalpaite

Formula:
Ag
 
3
CuSe
 
2
Essential elements:
All elements listed in formula:Ag, Cu, Se
Analyical Data:Average results of 15 electron-microprobe analyses
Emprical formula calculated on the basis of six atoms in total
Ag 59.20%
Cu 11.81%
Se 29.01%

total 100.02%
Empirical Formula:
Ag
 
2.99
Cu
 
1.01
Se
 
2.00

Relationship of Selenojalpaite to other Species

Related Minerals - Nickel-Strunz Grouping):
2.BA.05Chalcocite
Cu
 
2
S
2.BA.05Djurleite
Cu
 
31
S
 
16
2.BA.05Geerite
Cu
 
8
S
 
5
2.BA.05Roxbyite
Cu
 
9
S
 
5
2.BA.10Anilite
Cu
 
7
S
 
4
2.BA.10Digenite
Cu
 
9
S
 
5
2.BA.15Bornite
Cu
 
5
FeS
 
4
2.BA.20Bellidoite
Cu
 
2
Se
2.BA.20Berzelianite
Cu
 
2
Se
2.BA.25Athabascaite
Cu
 
5
Se
 
4
2.BA.25Umangite
Cu
 
3
Se
 
2
2.BA.30Rickardite
Cu
 
7
Te
 
5
2.BA.30Weissite
Cu
 
2-x
Te
2.BA.35Acanthite
Ag
 
2
S
2.BA.35Argentite
2.BA.40Mckinstryite
(Ag,Cu)
 
2
S
2.BA.40Stromeyerite
AgCuS
2.BA.45Jalpaite
Ag
 
3
CuS
 
2
2.BA.50Eucairite
AgCuSe
2.BA.55Aguilarite
Ag
 
4
SeS
2.BA.55Naumannite
Ag
 
2
Se
2.BA.60Cervelleite
Ag
 
4
TeS
2.BA.60Hessite
Ag
 
2
Te
2.BA.65Henryite
Ag
 
3
Cu
 
4
Te
 
4
2.BA.65Stützite
Ag
 
7
Te
 
4
2.BA.70Argyrodite
Ag
 
8
GeS
 
6
2.BA.70Canfieldite
Ag
 
8
(Sn,Ge)(S,Te)
 
6
2.BA.70Putzite
(Cu
 
4.7
Ag
 
3.3
)GeS
 
6
2.BA.75Fischesserite
Ag
 
3
AuSe
 
2
2.BA.75Penzhinite
(Ag,Cu)
 
4
Au(S,Se)
 
4
2.BA.75Petrovskaite
AuAg(S,Se)
2.BA.75Petzite
Ag
 
3
AuTe
 
2
2.BA.75Uytenbogaardtite
Ag
 
3
AuS
 
2
2.BA.80Bezsmertnovite
(Au,Ag)
 
4
Cu(Te,Pb)
2.BA.80Bilibinskite
PbCuAu
 
3
Te
 
2
2.BA.80Bogdanovite
(Au,Te,Pb)
 
3
(Cu,Fe)

Other Names for Selenojalpaite

Synonyms:
IMA2004-048
German names:
Selenojalpait

Other Information

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

References for Selenojalpaite

Reference List:Bindi, L. & Pratesi, G. (2005): "Selenojalpaite, Ag3CuSe2, a new mineral species from the Skrikerum Cu–Ag–Tl selenide deposit, Smaland, southeastern Sweden", Canadian Mineralogist: 43: 1373-1377.

Internet Links for Selenojalpaite

Search Engines:
  • Look for Selenojalpaite on Google
  • Look for Selenojalpaite images on Google
    • External Links:
  • Look for Selenojalpaite on Webmineral
  • Look for Selenojalpaite on Athena Mineralogy
  • Look for Selenojalpaite on Wikipedia
  • Look for Selenojalpaite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Selenojalpaite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Search for Selenojalpaite at Thames Valley Minerals
  • Lapis Mineral Magazin
  • Find Selenojalpaite on www.crystalclassics.co.uk
  • rare and unusual minerals mainly crystallized
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
  • Search for Selenojalpaite on minvision.com
  • Buy Fine Minerals from mineralsweb.com
  • Wendel Minerals - Auktion & Shop
  • Buy Minerals and Crystals from Crystalarium.com
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Rare and Unusual minerals at Mineralogical Research Company
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Selenojalpaite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Sweden
     
    • Östergötland
      • Valdemarsvik
    		L. Bindi & G. Pratesi (2005)
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.