Marrite Mineral Data

Marrite Mineral Data +

General Marrite Information

Chemical Formula:

PbAgAsS3

Composition:

Molecular Weight = 486.19 gm

Silver 22.19 % Ag

Arsenic 15.41 % As

Lead 42.62 % Pb

Sulfur 19.79 % S

______

100.00 %

Empirical Formula:

PbAgAsS₃

Environment:

Of hydrothermal origin with other sulfosalts in dolomite.

IMA Status:

Valid Species (Pre-IMA) 1904

Locality:

Lengenbach quarry, Binutal, Valais, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named for John Edward Marr (1857-1933), geologist of Canbridge, England.

Synonym:

ICSD 26835

PDF 21-1338

Marrite Image

Images:

Marrite

Comments: A prismatic crystal of marrite with small rounded crystals of galena in quartz.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Marrite Jordanite

Comments: Aggregate of gray prismatic crystals of marrite on fine-grained jordanite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture high 5 mm.
© Walter Gabriel

Marrite Crystallography

Axial Ratios:

a:b:c =0.575:1:0.473

Cell Dimensions:

a = 7.291, b = 12.68, c = 5.998, Z = 4; beta = 91.22° V = 554.39 Den(Calc)= 5.82

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.75(1), 3.45(1), 3(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wuensch B J , Nowacki W , Zeitschrift fur Kristallographie , 125 (1967) p.459-488, The crystal structure of marrite, PbAgAsS3, Locality: Lengenbach quarry, Binnatal, Switzerland

Physical Properties of Marrite

Cleavage:

None

Color:

Lead gray, Steel gray.

Density:

6.23

Diaphaniety:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Metallic

Streak:

brownish black

Optical Properties of Marrite

RL Anisotrophism:

Distinct, strong in oil.

RL Color:

White, with red internal reflections.

Calculated Properties of Marrite

Electron Density:

r_electron=5.03 gm/cc
note: r_Marrite=5.82 gm/cc.

Fermion Index

Fermion Index = 0.09566
Boson Index = 0.90434

Photoelectric:

PE_Marrite= 828.56 barns/electron
U=PE_Marrite x r_electron=4,165.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Marrite is Not Radioactive

Marrite Classification

Dana Class:

3.4.6.1 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.6)Dana Group

3.4.6.1 Marrite PbAgAsS3 P 2₁/a 2/m

3.4.6.2 Freieslebenite AgPbSbS3 P 2₁/n 2/m

Strunz Class:

II/E.17-10 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with As/Sb, x=3,0-2,5

II/E.17 - Marrite - Owyheeite series

II/E.17-10 Marrite PbAgAsS3 P 2₁/a 2/m

II/E.17-20 Freieslebenite AgPbSbS3 P 2₁/n 2/m

II/E.17-30 Diaphorite Pb2Ag3Sb3S8 C 21/a 2/m

II/E.17-40 Zoubekite AgPb4Sb4S10 Unk Ortho

II/E.17-50 Owyheeite Pb7Ag2(Sb,Bi)8S20 Pnam 2/m 2/m 2/m

Other Marrite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Marrite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Marrite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Marrite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Marrite Mineral Data :

Ask about Marrite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Marrite Specimen Label here :

Marrite

PbAgAsS3
Dana No: 3.4.6.1 Strunz No: II/E.17-10
Locality:

Notes: