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

Lorándite

This page is currently not sponsored. Click here to sponsor this page.
Baron Loránd von Eötvös
Formula:
TlAsS2
System:
Monoclinic
Colour:
Cochineal- to ...
Hardness:
2 - 2½
Name:
After Prof. Loránd Eötvös (1848-1919), physicist, mathematician and politician of Budapest.
This page provides mineralogical data about Lorándite.

Classification of Lorándite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.HD.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
3.7.6.1

3 : SULFOSALTS
7 : ø = 2
5.5.1

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl
mindat.org URL:
http://www.mindat.org/min-2434.html
Please feel free to link to this page.

First Recorded Occurrence of Lorándite

Year of Discovery:
1894

Occurrences of Lorándite

Geological Setting:
Low temperature hydrothermal

Physical Properties of Lorándite

Adamantine, Metallic
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Cochineal- to carmine-red; often dark lead-gray on the surface and frequently coated by an ochre-yellow powder.
Streak:
Cherry-red
Hardness (Mohs):
2 - 2½
Tenacity:
Elastic
Cleavage:
Very Good
{100} excellent; {201} very good; {001} good.
Density:
5.53 g/cm3 (Measured)    5.53 g/cm3 (Calculated)

Crystallography of Lorándite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/a
Cell Parameters:
a = 12.28(1) Å, b = 11.30(1) Å, c = 6.101(6) Å
β = 104.6°
Ratio:
a:b:c = 1.087 : 1 : 0.54
Unit Cell Volume:
V 819.26 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Short prismatic {110} and striated [001]; also prismatic {201}, {201}; tabular {201}.

Optical Data of Lorándite

Type:
Biaxial (+)
RI values:
nα = 2.720
Max Birefringence:
δ = 2.720
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Type:
Anisotropic
Anisotropism:
Strong
Dispersion:
relatively strong
Colour in reflected light:
Bluish gray-white
Internal Reflections:
Exhibited
Pleochroism:
Weak
Comments:
X nearly perpendicular {100}: ____; Y: purple-red; Z = b: Orange-red.

Chemical Properties of Lorándite

Formula:
TlAsS2
Essential elements:
All elements listed in formula:

Relationship of Lorándite to other Species

2.HD.05WeissbergiteTlSbS2
2.HD.15ChristiteTlHgAsS3
2.HD.20JankovićiteTl5Sb9(As,Sb)4S22
2.HD.25RebuliteTl5Sb5As8S22
2.HD.30ImhofiteTl5.8As15.4S26
2.HD.35EdenharteritePbTlAs3S6
2.HD.40JentschiteTlPbAs2SbS6
2.HD.45HutchinsoniteTlPbAs5S9
2.HD.50BernarditeTl(As,Sb)5S8
2.HD.55SicheriteTlAg2(As,Sb)3S6
2.HD.60GabrieliteTl6Ag3Cu6(As,Sb)9S21
5.5.2EllisiteTl3AsS3
5.5.3ImhofiteTl5.8As15.4S26
5.5.4SimoniteTlHgAs3S6
5.5.6ChristiteTlHgAsS3
5.5.6RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6
5.5.7HutchinsoniteTlPbAs5S9
5.5.8Wallisite(Cu,Ag)TlPbAs2S5
5.5.9BernarditeTl(As,Sb)5S8
5.5.10VrbaiteTl4Hg3Sb2As8S20
5.5.11RebuliteTl5Sb5As8S22
5.5.12GillulyiteTl2(As,Sb)8S13
5.5.13WeissbergiteTlSbS2
5.5.14Rohaite(Tl,Pb,K)2Cu8.7Sb2S4
5.5.15VaughaniteTlHgSb4S7
5.5.16ChalcothalliteTl2(Cu,Fe)6SbS4
5.5.17PierrotiteTl2Sb6As4S16
5.5.18ParapierrotiteTl(Sb,As)5S8
5.5.19CriddleiteTlAg2Au3Sb10S10
5.5.20ChabournéiteTl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5)

Other Names for Lorándite

Name in Other Languages:
German:Lorandit
Simplified Chinese:红铊矿
Spanish:Lorandita

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 Lorándite

Reference List:
Krenner (1894), Mat. Termés. Ért.: 12: 473.

Krenner (1895), Mat. Termés. Ért.: 13: 258.

Krenner (1897), Zs. Kr.: 27: 98.

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: 437-439.

Neues Jahrbuch für Mineralogie, Abhandlungen (1995): 168: 213.

Zeitschrift für Kristallographie: 30: 272-294.

Contributions to Mineralogy and Petrology: 16: 45-50.

Acta Crystallographica: 12: 1002-1006.

Internet Links for Lorándite

Localities for Lorándite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
China
 
  • Anhui Province
    • Ma'anshan Prefecture
      • He Co.
Zhou, T.F., Fan, Y., Yuan, F., Wu, M.A., Hou, M.J., Voicu, G., Hu, Q.H., Zhang, Q.M., and Yue, S.C. (2005): Mineralogy and Petrology 85(3/4), 243-251
  • Guizhou Province
    • Qianxi'nan Autonomous Prefecture
      • Xingren Co.
Zhang Baogui, and Zhang Zhong (2001): The biological and reworking metallogenic models of the Lanmuchang Tl deposit. Paper at the 11th Annual V.M. Goldschmidt Conference.
Zhiwei Bao, Zhenhua Zhao, Guha, J., and Williams-Jones, A.E. (2004): Geochemical Journal 38, 363-381.
Iran
 
  • West Azarbaijan Province (West Azerbaijan Province)
    • Takab (Takan Tepe)
Mehrabi, B., Yardley, B.W.D., and Cann, J.R. (1999): Mineralium Deposita 34, 673-696.; Asadi, H.H., Voncken, J.H.L, Kühnel, R.A., and Hale, M. (2000): Mineralium Deposita 35, 656-671.
Republic of Macedonia
 
  • Roszdan
Math. és Term.tud.Ert.(1894) 12, 473; The Canadian Mineralogist Vol.32, pp. 649-665 (1994)
Lechner Alois; Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume 271, Issue 2, 15 August 1988, Pages 297-300 ; Naturwissenschaften Volume 75, Number 1, 37-39; American Mineralogist 74:1401; Pavićević, M. K. (1988). Lorandite from Allchar—A low energy solar neutrino dosimeter. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 271(2), 287-296.
Russia
 
  • Northern Caucasus Region
    • Stavropol'skiy Kray
      • Pyatigorsk
        • Lermontovskoe U Deposit
          • Beshtau Mt.
            • mine №1
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld)
Graeser, S. (1967): Contributions to Mineralogy and Petrology 16(1), 45-50.
USA
 
  • Nevada
    • Elko Co.
      • Independence Mountains District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Eureka Co.
      • Lynn District
        • Elko
Min.Rec.:20:469.
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
NBMG Spec. Pub. 31 Minerals of Nevada
  • Utah
    • Tooele Co.
      • Oquirrh Mts
        • Mercur District (Camp Floyd District)
Mineral News: 19(12): 1, 3.
          • South Mercur Pit
American Mineralogist, Volume 76, pages 653-656, 1991
  • Wyoming
    • Albany Co.
      • New Rambler District
Wyoming State Geological Survey
    • Carbon Co.
      • Encampment District
        • Encampment
          • Red Mountain
Dana 7:I:293,439.
Mineral and/or Locality  
Copyright © mindat.org 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: January 27, 2015 12:35:20 Page generated: January 26, 2015 21:27:36