Ferrisurite Mineral Data

General Ferrisurite Information

Chemical Formula:

(Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O)

Composition:

Molecular Weight = 914.93 gm

Sodium 0.25 % Na 0.34 % Na₂O

Aluminum 1.77 % Al 3.34 % Al₂O₃

Iron 7.94 % Fe 0.79 % FeO / 10.47 % Fe₂O₃

Copper 4.17 % Cu 4.69 % Cu₂O

Silicon 12.28 % Si 26.27 % SiO₂

Hydrogen 0.39 % H 3.45 % H₂O

Lead 38.50 % Pb 41.47 % PbO

Carbon 2.23 % C 8.18 % CO₂

Oxygen 31.65 % O

Fluorine 0.83 % F 0.83 % F

- % F -0.35 % -O=F₂

______ ______

100.00 % 99.48 % = TOTAL OXIDE

Empirical Formula:

Pb_1.7Cu_0.6Na_0.1(CO₃)_1.7(OH)_0.5F_0.4Fe³⁺_1.2Al_0.6Fe²⁺_0.1Si₄O₁₀(OH)₂ï¿½0.5(H₂O)

Environment:

Oxidize lead deposit in contact metamorphosed and faulted shaly limestone.

IMA Status:

Approved IMA 1992

Locality:

Shirley Ann claim, Ubehebe district, Inyo County, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for its composition and relationship to surite.

Name Pronunciation:

Ferrisurite + Pronunciation

Synonym:

IMA1990-056

Ferrisurite Image

Images:

Ferrisurite

Comments: Olive-green crystalline ferrisurite, with radiating structure.
Location: Shirley Ann Claim, near Darwin, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrisurite Crystallography

Axial Ratios:

a:b:c =0.5774:1:1.7882

Cell Dimensions:

a = 5.241, b = 9.076, c = 16.23, Z = 2; beta = 90.03° V = 772.02 Den(Calc)= 3.94

Crystal System:

Monoclinic Space Group: P 2₁ or P 2₁/m

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

By Intensity(I/I_o): 4.53(1), 3.24(0.9), 2.612(0.8),2.272(0.5), 16.1(0.4), 3.727(0.35), 1.715(0.25), 5.4(0.25),

Physical Properties of Ferrisurite

Cleavage:

{???} Perfect

Color:

Forest green, Yellow green, Olive green.

Density:

Diaphaneity:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Silky

Streak:

greenish yellow

Optical Properties of Ferrisurite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.194,KPDmeas= 0.1911,KC= 0.1922
Ncalc = 1.76 - 1.77

Optical Data:

Biaxial (+), a=1.757, b=1.763, g=1.773, bire=0.0160, 2V(Calc)=76, 2V(Meas)=76.

Pleochroism (x):

yellow.

Pleochroism (y):

brown.

Pleochroism (z):

light green.

Calculated Properties of Ferrisurite

Electron Density:

Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Ferrisurite =4.00 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Ferrisurite= 652.49 barns/electron
U=PE_Ferrisurite x rElectron Density=2,382.51 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrisurite is Not Radioactive

Ferrisurite Classification

Dana Class:

71.02.04.01 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.02)with 2:1 Layers

(71.02.04)Surite group

71.02.04.01 Ferrisurite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O) P 2₁ or P 2₁/m Mono

71.02.04.02 Surite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Al,Fe)2(Si,Al)4O10(OH)2]•n(H2O) P 2₁ ro P 2₁/m Mono

71.02.04.03 Niksergievite! [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O C 2/m, C 2, or Cm Mono

Strunz Class:

09.EC.75 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.75 Ferrisurite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O) P 2₁ or P 2₁/m Mono

09.EC.75 Surite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Al,Fe)2(Si,Al)4O10(OH)2]•n(H2O) P 2₁ ro P 2₁/m Mono

09.EC.75 Niksergievite! [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O C 2/m, C 2, or Cm Mono

Other Ferrisurite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Ferrisurite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ferrisurite

(Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O)
Dana No: 71.02.04.01 Strunz No: 09.EC.75
Locality:

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