Quick Links : The Mindat Manual The Rock H. Currier Digital Library Mindat Newsletter [Free Download]

Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Contact Us Advertise on Mindat

Donate to Mindat Corporate Sponsorship Sponsor a Page Sponsored Pages Mindat Advertisers Advertise on Mindat

Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time Explore Fossils

Minerals by Properties Minerals by Chemistry Mineral Visual Explorer Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz Time Machine

Photo Search Photo Galleries Search by Color Photo Colour Explorer New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Ferrostalderite

A valid IMA mineral species

This page is currently not sponsored. Click here to sponsor this page.

Discuss Ferrostalderite

Search Photos of Ferrostalderite

Edit Ferrostalderite Add Synonym Edit CIF structures Clear Cache

Ferrostalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Ferrostalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Ferrostalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Hide all sections | Show all sections

About FerrostalderiteHide

Hans-Anton Stalder

Formula:

CuFe₂TlAs₂S₆

Colour:

Black

Lustre:

Metallic

Specific Gravity:

4.691 (Calculated)

Crystal System:

Tetragonal

Member of:

Routhierite Group

Name:

For its relation to stalderite and its iron content. Stalderite was named after Hans-Anton Stalder (1925-2011), curator, Natural History Museum, Bern and professor of mineralogy, University of Bern (Switzerland).

Type Locality:

ⓘ Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

The iron analogue of stalderite. Chemically similar to ferrovoronstovite.

Structure and crystallochemistry details (Biagioni et al., 2016): Cu present in the M1 and Zn in M2 site; the framework is built of (Cu,Fe)-centered tetrahedra and has channels (parallel to [001]) where dissimetric TlS₆ and (As,Sb)S₃ polyhedra reside.

Unique IdentifiersHide

Mindat ID:

46561

Long-form identifier:

mindat:1:1:46561:0

IMA Classification of FerrostalderiteHide

IMA status:

Approved

IMA Formula:

Cu¹⁺Fe²⁺₂Tl¹⁺As³⁺₂S^2-₆

Approval year:

2014

First published:

2016

Type description reference:

Biagioni, Cristian, Bindi, Luca, Nestola, Fabrizio, Cannon, Ralph, Roth, Philippe, Raber, Thomas (2016) Ferrostalderite, CuFe₂TlAs₂S₆, a new mineral from Lengenbach, Switzerland: occurrence, crystal structure, and emphasis on the role of iron in sulfosalts. Mineralogical Magazine, 80 (1) 175-186 doi:10.1180/minmag.2015.079.7.10

Classification of FerrostalderiteHide

Strunz-mindat (2026):

2.GA.40

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference for Standard
Fstd	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of FerrostalderiteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Black

Streak:

Black

Tenacity:

Brittle

Fracture:

Irregular/Uneven

Density:

4.691 g/cm³ (Calculated)

Optical Data of FerrostalderiteHide

Anisotropism:

Weakly anisotropic, with yellowish to bluish rotation tints

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)
471nm	24.2%	25.4%
548nm	23.7%	24.7%
586nm	22.9%	23.8%
652nm	21.0%	22.0%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 25.4%.
R₁ shown in black, R₂ shown in red

Colour in reflected light:

Dark gray

Internal Reflections:

Very weak

Chemistry of FerrostalderiteHide

Mindat Formula:

CuFe₂TlAs₂S₆

Element Weights:

Element	% weight
Tl	28.314 %
S	26.652 %
As	20.758 %
Fe	15.473 %
Cu	8.803 %

Calculated from ideal end-member formula.

Elements listed:

As, Cu, Fe, S, Tl - search for minerals with similar chemistry

Crystallography of FerrostalderiteHide

Crystal System:

Tetragonal

Class (H-M):

42m - Scalenohedral

Space Group:

I42m

Cell Parameters:

a = 9.8786(5) Å, c = 10.8489(8) Å

Ratio:

a:c = 1 : 1.098

Unit Cell V:

1058.71 Å³

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
Console Off | On | Grey | Yellow

Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0020619	Ferrostalderite	Biagioni C, Bindi L, Nestola F, Cannon R, Roth P, Raber T (2016) Ferrostalderite, CuFe2TlAs2S6, a new mineral from Lengenbach, Switzerland: occurrence, crystal structure, and emphasis on the role of iron in sulfosalts Mineralogical Magazine 80 175-186		2016	Lengenbach quarry, Binn Valley, Wallis, Switzerland	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Ferrostalderite'
loop_
_publ_author_name
'Biagioni C'
'Bindi L'
'Nestola F'
'Cannon R'
'Roth P'
'Raber T'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 80 
_journal_year 2016
_journal_page_first 175
_journal_page_last 186
_publ_section_title
;
 Ferrostalderite, CuFe2TlAs2S6, a new mineral from Lengenbach, Switzerland:
 occurrence, crystal structure, and emphasis on the role of iron in sulfosalts
;
_database_code_amcsd 0020619
_chemical_compound_source 'Lengenbach quarry, Binn Valley, Wallis, Switzerland'
_chemical_formula_sum 'Cu.75 Zn.53 Fe1.36 Ag.3 Hg.06 Tl (As1.96 Sb.04) S6'
_cell_length_a 9.8786
_cell_length_b 9.8786
_cell_length_c 10.8489
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1058.709
_exptl_crystal_density_diffrn      4.713
_symmetry_space_group_name_H-M 'I -4 2 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '-y,-x,z'
  '1/2-y,1/2-x,1/2+z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  'y,x,z'
  '1/2+y,1/2+x,1/2+z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
CuM1   0.00000   0.50000   0.25000   0.75000   0.02100
ZnM1   0.00000   0.50000   0.25000   0.25000   0.02100
FeM2   0.22410   0.50000   0.50000   0.68000   0.02560
AgM2   0.22410   0.50000   0.50000   0.15000   0.02560
ZnM2   0.22410   0.50000   0.50000   0.14000   0.02560
HgM2   0.22410   0.50000   0.50000   0.03000   0.02560
Tl   0.00000   0.00000   0.34889   1.00000   0.04790
As   0.26343   0.26343   0.24860   0.98000   0.01800
Sb   0.26343   0.26343   0.24860   0.02000   0.01800
S1   0.10170   0.34100   0.37900   1.00000   0.02070
S2   0.12870   0.12870   0.13000   1.00000   0.02130
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
CuM1 0.01490 0.01490 0.03330 0.00000 0.00000 0.00000
ZnM1 0.01490 0.01490 0.03330 0.00000 0.00000 0.00000
FeM2 0.03250 0.02220 0.02200 0.00000 0.00000 -0.00090
AgM2 0.03250 0.02220 0.02200 0.00000 0.00000 -0.00090
ZnM2 0.03250 0.02220 0.02200 0.00000 0.00000 -0.00090
HgM2 0.03250 0.02220 0.02200 0.00000 0.00000 -0.00090
Tl 0.05930 0.05930 0.02520 -0.01780 0.00000 0.00000
As 0.01720 0.01720 0.01960 -0.00030 0.00090 0.00090
Sb 0.01720 0.01720 0.01960 -0.00030 0.00090 0.00090
S1 0.02000 0.02010 0.02140 0.00540 0.00210 -0.00160
S2 0.02300 0.02300 0.01760 -0.00190 -0.00180 -0.00180

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
4.092 Å	(70)
3.493 Å	(23)
3.396 Å	(35)
3.124 Å	(17)
2.937 Å	(100)
2.656 Å	(19)
2.470 Å	(19)
2.435 Å	(33)

Locality:

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Reference:

Comments:

From Type Description.

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of FerrostalderiteHide

Type Locality:

ⓘ Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

General Appearance of Type Material:

Crystals, equant to prismatic, up to 50 µm.

Place of Conservation of Type Material:

Type material is deposited in the mineralogical collection of the Museo di Storia Naturale, Università di Firenze, Via La Pira 4, Firenze, Italy, catalogue number 3148/I.

Associated Minerals at Type Locality:

Dolomite

Pyrite

Realgar

Reference:

Synonyms of FerrostalderiteHide

IMA2014-090

Other Language Names for FerrostalderiteHide

Dutch:Ferrostalderiet

German:Ferrostalderit

Relationship of Ferrostalderite to other SpeciesHide

Member of:

Routhierite Group

Other Members of Routhierite Group:

Arsiccioite	AgHg₂Tl(As,Sb)₂S₆	Tet. 42m : I42m
Ralphcannonite	AgZn₂TlAs₂S₆	Tet. 42m : I42m
Routhierite	Tl(Cu,Ag)(Hg,Zn)₂(As,Sb)₂S₆	Tet. 42m : I42m
Stalderite	Tl(Cu,Ag)(Zn,Fe,Hg)₂(As,Sb)₂S₆	Tet. 42m : I42m
'Unnamed (Ag-Fe endmember of Routhierite Group)'	AgFe₂TlAs₂S₆

Related Minerals - Strunz-mindat Grouping Hide

2.GA.	Pyradoketosite	Ag₃SbS₃	Mon. 2/m
2.GA.	Arsiccioite	AgHg₂Tl(As,Sb)₂S₆	Tet. 42m : I42m
2.GA.	Eckerite	Ag₂CuAsS₃	Mon. 2/m : B2/b
2.GA.05	Proustite	Ag₃AsS₃	Trig. 3m(32/m) : R3c
2.GA.05	Pyrargyrite	Ag₃SbS₃	Trig. 3m : R3c
2.GA.10	Xanthoconite	Ag₃AsS₃	Mon. 2/m : B2/b
2.GA.10	Pyrostilpnite	Ag₃SbS₃	Mon. 2/m : P2₁/b
2.GA.15	Samsonite	Ag₄MnSb₂S₆	Mon. 2/m : P2₁/m
2.GA.20	Bytízite	Cu₃SbSe₃	Orth. mmm(2/m2/m2/m) : Pnma
2.GA.20	Skinnerite	Cu₃SbS₃	Mon. 2/m : P2₁/b
2.GA.20	Wittichenite	Cu₃BiS₃	Orth. 222 : P2₁2₁2₁
2.GA.25	Lapieite	NiCuSbS₃	Orth. 222 : P2₁2₁2₁
2.GA.25	Lisiguangite	PtCuBiS₃	Orth. 222 : P2₁2₁2₁
2.GA.25	Malyshevite	PdCuBiS₃	Orth. mmm(2/m2/m2/m) : Pmmm
2.GA.25	Roterbärite	PdBiCuSe₃	Orth. 222 : P2₁2₁2₁
2.GA.25	Mückeite	NiCu(Bi,Sb)S₃	Orth. 222 : P2₁2₁2₁
2.GA.30	Aktashite	Cu₆Hg₃As₄S₁₂	Trig. 3 : R3
2.GA.30	Nowackiite	Cu₆Zn₃As₄S₁₂	Trig. 3 : R3
2.GA.30	Zhengminghuaite	Cu₆Fe₃As₄S₁₂	Trig. 3 : R3
2.GA.30	Gruzdevite	Cu₆Hg₃Sb₄S₁₂	Trig. 3 : R3
2.GA.35	Laffittite	AgHgAsS₃	Mon. 2/m
2.GA.40	'Unnamed (Ag-Fe endmember of Routhierite Group)'	AgFe₂TlAs₂S₆
2.GA.40	Routhierite	Tl(Cu,Ag)(Hg,Zn)₂(As,Sb)₂S₆	Tet. 42m : I42m
2.GA.40	Stalderite	Tl(Cu,Ag)(Zn,Fe,Hg)₂(As,Sb)₂S₆	Tet. 42m : I42m
2.GA.40	Ralphcannonite	AgZn₂TlAs₂S₆	Tet. 42m : I42m
2.GA.45	Erniggliite	Tl₂SnAs₂S₆	Trig. 3 : P3
2.GA.50	Cerromojonite	CuPbBiSe₃	Orth.
2.GA.50	Seligmannite	PbCuAsS₃	Orth. mmm(2/m2/m2/m) : Pmmn
2.GA.50	Součekite	CuPbBi(S,Se)₃	Orth. mm2
2.GA.50	'Unnamed (Pb-Cu-Bi Selenide)'	PbCuBiSe₃
2.GA.50	Bournonite	PbCuSbS₃	Orth. mm2 : Pmn2₁
2.GA.55	Eldragónite	Cu₆BiSe₄(Se₂)	Orth. mmm(2/m2/m2/m)

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for FerrostalderiteHide

mindat.org URL:

https://www.mindat.org/min-46561.html
Please feel free to link to this page.

Search Engines:

Look for Ferrostalderite on Google

Look for Ferrostalderite images on Google

Look for Ferrostalderite on Bing

Look for Ferrostalderite images on Bing

Look for Ferrostalderite on DuckDuckGo

Look for Ferrostalderite images on DuckDuckGo

Look for Ferrostalderite in the Rock H. Currier Digital Library

External Links:

Look for Ferrostalderite on Webmineral

Look for Ferrostalderite on Wikipedia

Look for Ferrostalderite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for FerrostalderiteHide

Reference List:

Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter No 24. Mineralogical Magazine, 79 (2) 247-251 doi:10.1180/minmag.2015.079.2.03

(2022) Ferrostalderite. Handbook of Mineralogy. Mineralogical Society of America

Localities for FerrostalderiteHide

Showing 1 localities.

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.

Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Switzerland (TL)

Valais

Goms

Binn

Fäld

ⓘ Lengenbach Quarry (TL)

Hålenius et al. (2015) +1 other reference

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 28, 2026 20:46:57 Page updated: August 19, 2026 01:55:19

Go to top of page

Ferrostalderite

About FerrostalderiteHide

Unique IdentifiersHide

IMA Classification of FerrostalderiteHide

Classification of FerrostalderiteHide

Mineral SymbolsHide

Physical Properties of FerrostalderiteHide

Optical Data of FerrostalderiteHide

Chemistry of FerrostalderiteHide

Crystallography of FerrostalderiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of FerrostalderiteHide

Synonyms of FerrostalderiteHide

Other Language Names for FerrostalderiteHide

Relationship of Ferrostalderite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for FerrostalderiteHide

References for FerrostalderiteHide

Localities for FerrostalderiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide