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Rathite

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Gerhard vom Rath
Formula:
Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40
May contain minor Sb substituting for As.
System:
Monoclinic
Colour:
Silver to lead-gray, ...
Hardness:
3
Member of:
Name:
Named after Gerhard vom Rath (1830-1888), Professor of Mineralogy, Bonn, Germany.
Berlepsch et al. (2002) note that Ag substitution is probably essential in the structure and makes the mineral different from dufrénoysite.

Classification of Rathite

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

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
3.7.12.1

3 : SULFOSALTS
7 : ø = 2
5.7.47

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
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http://www.mindat.org/min-3370.html
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First Recorded Occurrence of Rathite

Physical Properties of Rathite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Silver to lead-gray, tarnishes iridescent
Streak:
Chocolate-brown
Hardness (Mohs):
3
Cleavage:
Perfect
{100} perfect.
Parting:
On {010}.
Fracture:
Conchoidal
Density:
5.33 - 5.41 g/cm3 (Measured)    5.31 g/cm3 (Calculated)

Crystallography of Rathite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/c
Cell Parameters:
a = 8.496(1) Å, b = 7.969(1) Å, c = 25.122(3) Å
β = 100.704(2)°
Ratio:
a:b:c = 1.066 : 1 : 3.152
Unit Cell Volume:
V 1,671.28 ų (Calculated from Unit Cell)
Morphology:
Prismatic to short prismatic and striated [001].
Twinning:
On {100} producing polysynthetic pseudo-orthorhombic crystals; also on {3¯01}. Exhibits polysynthetic twin lamellae of irregular thickness.
Comment:
Data from Berlepsch et al. (2002).

Optical Data of Rathite

Type:
Anisotropic
Anisotropism:
Strong
Colour in reflected light:
White
Internal Reflections:
Deep red
Pleochroism:
Strong

Chemical Properties of Rathite

Formula:
Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40

May contain minor Sb substituting for As.
Idealised Formula:
(Pb,Tl)3As5S10
Essential elements:
All elements listed in formula:

Relationship of Rathite to other Species

Member of:
Other Members of Group:
BarikaiteAg3Pb10(Sb8As11)S40
BaumhaueritePb12As16S36
Baumhauerite-2aPb11Ag(As,Sb)18S36
BoscardiniteTlPb4(Sb7As2)S18
Carducciite(Ag2Sb2)Pb12(As,Sb)16S40
DufrénoysitePb2As2S5
GuettarditePbAsSbS4
ParapierrotiteTl(Sb,As)5S8
PhilrothiteTlAs3S5
PierrotiteTl2Sb6As4S16
SartoritePbAs2S4
Twinnite Pb0.8Tl0.1Sb1.3As0.8S4
VeenitePb2(Sb,As)2S5
2.HC.05bBaumhauerite-2aPb11Ag(As,Sb)18S36
2.HC.05bBaumhaueritePb12As16S36
2.HC.05eChabournéiteTl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5)
2.HC.05dDufrénoysitePb2As2S5
2.HC.05aGuettarditePbAsSbS4
2.HC.05cLiveingitePb9As13S28
2.HC.05fParapierrotiteTl(Sb,As)5S8
2.HC.05fPierrotiteTl2Sb6As4S16
2.HC.05aSartoritePbAs2S4
2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4
2.HC.05dVeenitePb2(Sb,As)2S5
2.HC.05gMarumoitePb32As40S92
2.HC.05eDalnegroite(Tl4Pb2)(As12Sb8)S34
2.HC.10aFülöppitePb3Sb8S15
2.HC.10cHeteromorphitePb7Sb8S19
2.HC.10bPlagionitePb5Sb8S17
2.HC.10dRayitePb8(Ag,Tl)2Sb8S21
2.HC.10dSemseyitePb9Sb8S21
2.HC.15BoulangeritePb5Sb4S11
2.HC.15FalkmanitePb5.4Sb3.6S11
2.HC.20RobinsonitePb4Sb6S13
2.HC.25MoëloitePb6Sb6S14(S3)
2.HC.30DadsonitePb23Sb25S60Cl
2.HC.35OwyheeiteAg3+xPb10-2xSb11+xS28, -0.13 < x > +0.20
2.HC.35ZoubekiteAgPb4Sb4S10
2.HC.40ParasterryiteAg4Pb20Sb14As10S58
5.7.1SeligmannitePbCuAsS3
5.7.2BournonitePbCuSbS3
5.7.3MeneghinitePb13CuSb7S24
5.7.4GladitePbCuBi5S9
5.7.5LindströmitePb3Cu3Bi7S15
5.7.6KrupkaitePbCuBi3S6
5.7.7HammaritePb2Cu2Bi4S9
5.7.8FriedrichitePb5Cu5Bi7S18
5.7.9AikinitePbCuBiS3
5.7.10NuffielditeCu1.4Pb2.4Bi2.4Sb0.2S7
5.7.11JaskólskiitePb2+xCux(Sb,Bi)2-xS6 (x = 0.2)
5.7.12TintinaitePb22Cu4(Sb,Bi)30S69
5.7.13KobellitePb22Cu4(Bi,Sb)30S69
5.7.14ProuditeCuPb7.5Bi9.33(S,Se)22
5.7.15NordströmiteCuPb3Bi7(Se4S10)
5.7.16WatkinsoniteCu2PbBi4(Se,S,Te)8
5.7.17PekoitePbCuBi11(S,Se)18
5.7.18PetroviciteCu3HgPbBiSe5
5.7.19Eclarite(Cu,Fe)Pb9Bi12S28
5.7.20MarriteAgPbAsS3
5.7.21Baumhauerite-2aPb11Ag(As,Sb)18S36
5.7.22AndoritePbAgSb3S6
5.7.23Ramdohrite(Cd,Mn,Fe)Ag5.5Pb12Sb21.5S48
5.7.24RoshchiniteAg19Pb10Sb51S96
5.7.25OurayiteAg3Pb4Bi5S13
5.7.26EskimoiteAg7Pb10Bi15S36
5.7.27FizélyiteAg5Pb14Sb21S48
5.7.28OwyheeiteAg3+xPb10-2xSb11+xS28, -0.13 < x > +0.20
5.7.29FreieslebeniteAgPbSbS3
5.7.30DiaphoriteAg3Pb2Sb3S8
5.7.31SterryiteAg2Pb10(Sb,As)12S29
5.7.32VikingiteAg5Pb8Bi13S30
5.7.33ZoubekiteAgPb4Sb4S10
5.7.34SchirmeritePbAgBi3S6 - Pb3Ag1.5Bi3.5S9
5.7.36GustaviteAg3Pb5Bi11S24
5.7.37KitaibeliteAg10PbBi30S51
5.7.38TreasuriteAg7Pb6Bi15S32
5.7.39Benjaminite(Ag,Cu)3(Bi,Pb)7S12
5.7.40Lengenbachite Ag4Cu2Pb18As12S39 ·
5.7.41BerryiteCu3Ag2Pb3Bi7S16
5.7.42NeyiteAg2Cu6Pb25Bi26S68
5.7.43Larosite(Cu,Ag)21(Pb,Bi)2S13
5.7.44CupropavoniteAgCu2PbBi5S10
5.7.45PadĕraiteCu5.9Ag1.3Pb1.6Bi11.2S22
5.7.46RayitePb8(Ag,Tl)2Sb8S21
5.7.48HatchiteAgTlPbAs2S5

Other Names for Rathite

Name in Other Languages:
Russian:Ратит
Simplified Chinese:斜方砷铅矿
Spanish:Rathita

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 Rathite

Reference List:
von Waltershausen in Urlaub and Nason (1857), Ann. Phys.: 100: 540.

Baumhauer (1896), Zs. Kr.: 26: 593.

Solly (1911), Mineralogical Magazine: 16: 121.

Lewis (1912) Mineralogical Magazine: 16: 197.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 455-457.

Zeitschrift für Kristallographie: 122: 433-456.

Neues Jahrbuch für Mineralogie, Monatshefte (1974): 530.

Laroussi, A., Moëlo, Y., Ohnenstetter, D., Ginderow, D. (1989): Argent et thallium dans les sulfosels de la série de la sartorite (Gisement de Lengenbach, vallée de Binn, Suisse). Comptes Rendus de l'Académie des Sciences, Série II, 308, 927-933.

Berlepsch, P., Armbruster, T., Topa, D. (2002): Structural and chemical variations in rathite, Pb8Pb4−x(Tl2As2)x(Ag2As2)As16S40: modulations of a parent structure. Zeitschrift für Kristallographie 217, 580-590. [http://rruff.info/doclib/zk/vol217/ZK217_581.pdf]

Internet Links for Rathite

Localities for Rathite

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.
Italy
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Pietrasanta
          • Valdicastello Carducci
Biagioni, C., Orlandi, P., Moëlo, Y., Pardini, S. & Passarino, G. (2012). Sterryite e parasterryite. I solfosali aciculari di piombo e argento della miniera del Pollone (Pietrasanta, Lucca). Rivista Mineralogica Italiana, 2/2012, 76-91
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Binn
Cannon, R., Hensel, H. & Raber, T. (2008): Der Reckibach-Dolomit im Binntal, Schweiz: Mineralbestand und Neufunde. Lapis, 33 (3), 20-28; 50. (in German)
      • Fäld (Imfeld; Im Feld; Feld)
Zeits.Kryst.Min.(1896) 26, 593-602
Mineral and/or Locality  
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