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Rohaite

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Formula:
(Tl,Pb,K)2Cu8.7Sb2S4
System:
Orthorhombic
Hardness:
3 - 3½
Name:
Named after John Rose Hansen, professor of mineralogy.
This page provides mineralogical data about Rohaite.

Classification of Rohaite

Approved
2.BD.35

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
3.7.16.1

3 : SULFOSALTS
7 : ø = 2
5.5.14

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl
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First Recorded Occurrence of Rohaite

Year of Discovery:
1978

Physical Properties of Rohaite

Diaphaneity (Transparency):
Opaque
Hardness (Mohs):
3 - 3½

Crystallography of Rohaite

Crystal System:
Orthorhombic
Cell Parameters:
a = 3.8Å, c = 20.98Å
Ratio:
a:c = 1 : 5.521
Unit Cell Volume:
V 0.00 ų (Calculated from Unit Cell)

Chemical Properties of Rohaite

Formula:
(Tl,Pb,K)2Cu8.7Sb2S4
Idealised Formula:
TlCu5SbS2
Essential elements:
All elements listed in formula:
Common Impurities:
Pb,Fe

Relationship of Rohaite to other Species

2.BD.UM2004-33-S:AgCuHgSe(Ag,Cu)8Hg3(S,Se)7
2.BD.05ImiteriteAg2HgS2
2.BD.10Gortdrumite(Cu,Fe)6Hg2S5
2.BD.15BalkaniteCu9Ag5HgS8
2.BD.15Danielsite(Cu,Ag)14HgS8
2.BD.20DonharrisiteNi8Hg3S9
2.BD.25CarliniteTl2S
2.BD.30BukoviteTl2(Cu,Fe)4Se4
2.BD.30MurunskiteK2(Cu,Fe)4S4
2.BD.30ThalcusiteTl2Cu3FeS4
2.BD.40ChalcothalliteTl2(Cu,Fe)6SbS4
2.BD.45SabatieriteCu6TlSe4
2.BD.50CrookesiteCu7(Tl, Ag)Se4
2.BD.55BrodtkorbiteCu2HgSe2
5.5.1LoránditeTlAsS2
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
5.5.15VaughaniteTlHgSb4S7
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 Rohaite

Name in Other Languages:
German:Rohait
Simplified Chinese:硫锑铜铊矿
Spanish:Rohaita

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 Rohaite

Reference List:
American Mineralogist (1980): 65: 208-209.

Neues Jahrbuch für Mineralogie, Abhandlungen (1980): 138: 122-146.

Internet Links for Rohaite

Localities for Rohaite

(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.
Greenland
 
  • Kujalleq
    • Narsaq
American Mineralogist (1980): 65: 208-209.; Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
        • Kuannersuit Plateau (Kvanefjeld)
Petersen, O. V. & Johnsen, O. (2005): Mineral species first described from Greenland. Canadian Mineralogist, Special publication no. 8.
Mineral and/or Locality  
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