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Leadamalgam

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Formula:
Pb0.7Hg0.3
System:
Tetragonal
Colour:
Grey-white
Lustre:
Metallic
Hardness:
This page provides mineralogical data about Leadamalgam.


Classification of Leadamalgam

Approved
1/A.02-100
1.AD.30

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
Dana 7th ed.:
1.1.14.1
1.1.10.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.32

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

Physical Properties of Leadamalgam

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Grey-white
Hardness (Mohs):

Optical Data of Leadamalgam

Type:
Anisotropic
Colour in reflected light:
white to yellowish-white
Pleochroism:
Weak
Comments:
weak bluish grey to pale bluish grey pleochroism

Chemical Properties of Leadamalgam

IMA Formula:
Pb0.7Hg0.3
Mindat.org Formula:
Pb0.7Hg0.3

Analysis corresponds to HgPb^2. Crystallographic unit cell has 1 atom per lattice point, implying disordered Pb and Hg in approximate 2:1 ratio.
Idealised Formula:
(Pb, Hg)
Elements listed in formula:
Analytical Data:
Analysis (1) from Handbook of Mineralogy
Hg (33.03)
Pb (66.96)

Crystallography of Leadamalgam

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Cell Parameters:
a = 3.545(16) Å, c = 4.525(20) Å
Ratio:
a:c = 1 : 1.276
Unit Cell Volume:
V 56.87 ų (Calculated from Unit Cell)
Z:
2

Type Occurrence of Leadamalgam

General Appearance of Type Material:
Isolated grain in ore concentrates, maximum dimension 50 microns.
Associated Minerals at Type Locality:

Relationship of Leadamalgam to other Species

1.AD.05MercuryHg
1.AD.10BelendorffiteCu7Hg6
1.AD.10KolymiteCu7Hg6
1.AD.15cEugeniteAg11Hg2
1.AD.15bLuanheiteAg3Hg
1.AD.15dMoschellandsbergiteAg2Hg3
1.AD.15aParaschachneriteAg1.2Hg0.8
1.AD.15aSchachneriteAg1.1Hg0.9
1.AD.20aWeishanite(Au,Ag)1.2Hg0.8
1.AD.20bGoldamalgam (of Chen et al.)(Au,Ag)Hg
1.AD.25PotaritePdHg
1.1CopperCu
1.2SilverAg
1.5GoldAu
1.6AuricuprideCu3Au
1.7Tetra-auricuprideCuAu
1.8ZincZn
1.9CadmiumCd
1.10DanbaiteCuZn2
1.11ZhanghengiteCuZn
1.12MercuryHg
1.13KolymiteCu7Hg6
1.14MoschellandsbergiteAg2Hg3
1.15EugeniteAg11Hg2
1.16SchachneriteAg1.1Hg0.9
1.17ParaschachneriteAg1.2Hg0.8
1.18LuanheiteAg3Hg
1.19Weishanite(Au,Ag)1.2Hg0.8
1.20IndiumIn
1.21AluminiumAl
1.22Khatyrkite(Cu,Zn)Al2
1.23CupaliteCuAl
1.24DiamondC
1.25GraphiteC
1.26ChaoiteC
1.27LonsdaleiteC
1.28SiliconSi
1.29TinSn
1.30LeadPb
1.31AnyuiiteAuPb2
1.31NovodnepriteAuPb3
1.33ArsenicAs
1.34ArsenolampriteAs
1.35PaxiteCuAs2
1.36KoutekiteCu5As2
1.37DomeykiteCu3As
1.38AlgodoniteCu1-xAsx (x ~0.15)
1.39Novákite(Cu,Ag)21As10
1.40KutinaiteAg6Cu14As7
1.41AntimonySb
1.42StibarsenSbAs
1.43ParadocrasiteSb3As
1.44HorsforditeCu, Sb
1.45CuprostibiteCu2(Sb,Tl)
1.46AllargentumAg1-xSbx (x=0.09-0.16)
1.47AurostibiteAuSb2
1.48DyscrasiteAg3+xSb1-x (x~0.2)
1.49BismuthBi
1.50MaldoniteAu2Bi
1.51SulphurS
1.52RosickýiteS
1.53SeleniumSe
1.54TelluriumTe
1.55ChromiumCr
1.56RheniumRe
1.57IronFe
1.58ChromferideFe1.5Cr0.2
1.59FerchromideCr1.5Fe0.2
1.60WairauiteCoFe
1.61NickelNi
1.62Kamacite(Fe,Ni)
1.63Taenite(Ni,Fe)
1.64TetrataeniteFeNi
1.65AwaruiteNi3Fe
1.66PalladiumPd
1.67PotaritePdHg
1.68PaolovitePd2Sn
1.69StannopalladinitePd3Sn2
1.70CabriitePd2CuSn
1.71Taimyrite(Pd,Cu,Pt)3Sn
1.72AtokitePd3Sn
1.73RustenburgitePt3Sn
1.74ZvyagintsevitePd3Pb
1.75PlumbopalladinitePb2Pd3
1.76OsmiumOs
1.77IridiumIr
1.82PlatinumPt
1.83HongshiitePtCu
1.84NiggliitePtSn
1.85IsoferroplatinumPt3Fe
1.86TetraferroplatinumPtFe
1.87TulameeniteCuFePt2
1.88FerronickelplatinumPt2FeNi
1.89RhodiumRh

Other Names for Leadamalgam

Name in Other Languages:
German:Altmarkit
Spanish:Altmarkita

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 Leadamalgam

Reference List:
Chen Keqiao, Yang Huifang, Ma Letian, and Peng Zhizhong (1981): The discovery of two new minerals - goldamalgam and leadamalgam. Dizhi Lun Ping [Geological Review] 27(2), 108-115 (in Chinese with English abstract). - American Mineralogist (1985), 70, 215-216 (abstract).

Internet Links for Leadamalgam

mindat.org URL:
https://www.mindat.org/min-2360.html
Please feel free to link to this page.

Localities for Leadamalgam

This 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 (TL)
 
  • Inner Mongolia Autonomous Region
    • Hohhot League (Huhehaote Prefecture)
      • Wuchuan Co.
Chen Keqiao, Yang Huifang, Ma Letian, and Peng Zhizhong (1981): Dizhi Lun Ping [Geological Review] 27(2), 108-115
Germany
 
  • Saxony-Anhalt
Kaemmel, T., Muller, E.P., Krossner, L., Nebel, J., Unger, H., Ungethum, H. (1977): Altmarkite, a new mineral (preliminary report). Z. angew. Geol.: 23: 535-536 (in German); in: Fleischer, M., Chao, G.Y., Mandarino, J.A. (1979): New mineral names. American Mineralogist: 64: 652
Mexico
 
  • Sonora
    • Mun. de Moctezuma
Lapis 2001(1), 11-40
Jeff Weissman photo. Excalibur mineral specimen.
Mineral and/or Locality  
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