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Philrothite

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Philippe Roth 2007
Formula:
TlAs3S5
System:
Monoclinic
Lustre:
Metallic
Hardness:
3 - 3½
Member of:
Name:
Named in honour of Philippe Roth (b. 1963), geophysicist and head of the 'Forschungsgemeinschaft Lengenbach'. He is a well known mineral expert on the Lengenbach minerals.
The N = 4 homologue of the sartorite homologous series.

Compare also Unnamed (Tl-Sb-As Sulphide).




Classification of Philrothite

Approved
Approval Year:
2013

Physical Properties of Philrothite

Metallic
Diaphaneity (Transparency):
Opaque
Streak:
Dark brown streak
Hardness (Mohs):
3 - 3½
Comment:
(VHN25) is 128 kg/mm2 (range: 120–137)
Tenacity:
Brittle

Optical Data of Philrothite

Type:
Anisotropic
Anisotropism:
Anisotropic with grey to bluish rotation tints (Under crossed polars)
Pleochroism:
Weak
Comments:
Weakly pleochroic from dark grey to light grey

Chemical Properties of Philrothite

Formula:
TlAs3S5
Elements listed in formula:
Analytical Data:
Mean of five electron microprobe analyses
Tl(26.28)(12)
Pb(6.69)(8)
Ag(2.50)(4)
Cu(0.04)(2)
Hg(0.07)(2)
As(32.50)(13)
Sb(3.15)(3)
S(26.35)(10)
total 97.58 wt.%

Crystallography of Philrothite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/c
Cell Parameters:
a = 8.013(2) Å, b = 24.829(4) Å, c = 11.762(3) Å
β = 132.84(2)°
Ratio:
a:b:c = 0.323 : 1 : 0.474
Unit Cell Volume:
V 1715.9 ų
Z:
8
X-Ray Powder Diffraction Data:
d-spacingIntensity
12.4145(52)
3.6768(100)
3.4535(45)
3.0150(46)
2.8941(52)
2.7685(76)
2.7642(77)
2.3239(52)

Type Occurrence of Philrothite

General Appearance of Type Material:
Crystals up to 200 μm across on realgar
Empirical Formula:
(Tl0.789Pb0.198)Σ=0.987(As2.662Sb0.159Ag0.142Cu0.004Hg0.002)Σ=2.969S5.044.
Associated Minerals at Type Locality:

Relationship of Philrothite to other Species

Member of:
Other Members of Group:
ArgentobaumhaueriteAg1.5Pb22As33.5S72
ArgentodufrénoysiteAg3Pb26As35S80
ArgentoliveingiteAgxPb40-2xAs48+xS112
BarikaiteAg3Pb10(Sb8As11)S40
BaumhaueritePb12As16S36
BernarlottiitePb6(As5Sb3)S18
BoscardiniteTlPb4(Sb7As2)S18
Carducciite(Ag2Sb2)Pb12(As,Sb)16S40
DufrénoysitePb2As2S5
ÉcrinsiteAgTl3Pb4As11Sb9S36
EnneasartoriteTl6Pb32As70S140
GuettarditePbAsSbS4
HendekasartoriteTl2Pb48As82S172
HeptasartoriteTl7Pb22As55S108
HyršlitePb8As10Sb6S32
IncomsartoriteTl6Pb144As246S516
LiveingitePb9As13S28
ParapierrotiteTlSb5S8
PierrotiteTl2(Sb,As)10S16
PolloneiteAgPb46As26Sb23S120
RathiteAg2Pb12-xTlx/2As18+x/2S40
SartoritePbAs2S4
Twinnite Pb0.8Tl0.1Sb1.3As0.8S4
VeenitePb2(Sb,As)2S5

Other Names for Philrothite

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 Philrothite

Reference List:
Bindi, L., Nestola, F., Makovicky, E., Guastoni, A., de Battisti, L. (2014): Tl-bearing sulfosalt from the Lengenbach quarry, Binn valley, Switzerland: Philrothite, TlAs3S5. Mineralogical Magazine, 78, 1-9.

Internet Links for Philrothite

mindat.org URL:
https://www.mindat.org/min-44003.html
Please feel free to link to this page.

Localities for Philrothite

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.
Switzerland (TL)
 
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld)
Bindi, L., Nestola, F., Makovicky, E., Guastoni, A., de Battisti, L. (2014): Tl-bearing sulfosalt from the Lengenbach quarry, Binn valley, Switzerland: Philrothite, TlAs3S5. Mineralogical Magazine, 78, 1-9.
Mineral and/or Locality  
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