Honours Francois Le Guern (1942-2011), better known as ‘‘Fanfan’’. With a large number of publications under his belt, Fanfan Le Guern was a very active volcanologist, and an expert on volcanic gases and sublimates.

Type Locality:

ⓘ La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Metropolitan City of Messina, Sicily, Italy

This page provides mineralogical data about Leguernite.

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Unique IdentifiersHide

Mindat ID:

43928

Long-form identifier:

mindat:1:1:43928:0

IMA Classification of LeguerniteHide

IMA status:

Approved

IMA Formula:

Bi³⁺₃₈O₄₂(S⁶⁺O₄)₁₅

Approval year:

2013

Classification of LeguerniteHide

Strunz-mindat (2026):

7.A0.

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H₂O
0 :

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
Lg	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 LeguerniteHide

Lustre:

Sub-Adamantine

Colour:

Colorless, white

Streak:

White

Tenacity:

Brittle

Cleavage:

None Observed

Fracture:

None observed

Density:

7.375 g/cm³ (Calculated)

Chemistry of LeguerniteHide

Mindat Formula:

Bi₃₈O₄₂(SO₄)₁₅

Element Weights:

Element	% weight
Bi	78.985 %
O	16.232 %
S	4.784 %

Calculated from ideal end-member formula.

Elements listed:

Bi, O, S - search for minerals with similar chemistry

Crystallography of LeguerniteHide

Crystal System:

Monoclinic

Class (H-M):

2 - Sphenoidal

Space Group:

Setting:

Cell Parameters:

a = 11.2486(11) Å, b = 5.6568(6) Å, c = 11.9139(10) Å
β = 99.177(7)°

Ratio:

a:b:c = 1.989 : 1 : 2.106

Unit Cell V:

748.39 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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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)
0020607	Leguernite	Garavelli A, Pinto D, Mitolo D, Bindi L (2014) Leguernite, Bi12.67O14(SO4)5, a new Bi oxysulfate from the fumarole deposit of La Fossa crater, Vulcano, Aeolian Islands, Italy Mineralogical Magazine 78 1629-1645		2014	La Fossa crater, Vulcano, Aeolian Islands, Italy	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Leguernite'
loop_
_publ_author_name
'Garavelli A'
'Pinto D'
'Mitolo D'
'Bindi L'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 78 
_journal_year 2014
_journal_page_first 1629
_journal_page_last 1645
_publ_section_title
;
 Leguernite, Bi12.67O14(SO4)5, a new Bi oxysulfate from the fumarole deposit of
 La Fossa crater, Vulcano, Aeolian Islands, Italy
;
_database_code_amcsd 0020607
_chemical_compound_source 'La Fossa crater, Vulcano, Aeolian Islands, Italy'
_chemical_formula_sum 'Bi12.667 S5 O34'
_cell_length_a 11.2486
_cell_length_b 5.6568
_cell_length_c 11.9139
_cell_angle_alpha 90
_cell_angle_beta 99.177
_cell_angle_gamma 90
_cell_volume 748.391
_exptl_crystal_density_diffrn      7.436
_symmetry_space_group_name_H-M 'P 1 2 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,y,-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
Bi1   0.33418   0.29780   0.01006   1.00000   0.01230
Bi2   0.53822   0.79960   0.15842   1.00000   0.01250
Bi3   0.21076   0.71180   0.19423   1.00000   0.01510
Bi4   0.40591   0.21430   0.32991   1.00000   0.01410
Bi5   0.25801   0.22040   0.69433   1.00000   0.01060
Bi6   0.13281   0.72400  -0.13890   1.00000   0.01610
Bi7   0.00000   0.73660   0.50000   0.66667   0.03150
S1   0.32630   0.69700   0.53500   1.00000   0.01500
S2   0.07200   0.21700   0.35480   1.00000   0.02000
S3   0.00000   0.19800   0.00000   1.00000   0.01500
O1   0.21400   0.69200   0.58700   1.00000   0.02900
O2   0.39800   0.91500   0.56400   1.00000   0.04100
O3   0.39200   0.48300   0.58200   1.00000   0.06300
O4   0.29800   0.73700   0.40900   1.00000   0.06800
O5   0.00900   0.44600   0.34300   1.00000   0.02800
O6   0.11800   0.17600   0.47700   1.00000   0.04500
O7   0.16500   0.23300   0.28100   1.00000   0.04400
O8  -0.01900   0.02900   0.31600   1.00000   0.04600
O9   0.11200   0.06300   0.03100   1.00000   0.09000
O10  -0.01400   0.34400   0.09000   1.00000   0.09000
O11   0.26900   0.46918  -0.16900   1.00000   0.00600
O12   0.26600  -0.03000  -0.16400   1.00000   0.00400
O13   0.35300   0.46800   0.20100   1.00000   0.01200
O14   0.35300   0.96600   0.20000   1.00000   0.00800
O15   0.50000   0.48900   0.00000   1.00000   0.01300
O16   0.50000  -0.00800   0.00000   1.00000   0.00600
O17   0.55400**********   0.23500   1.00000   0.01500
O18   0.23300   0.65500   0.02100   1.00000   0.02100
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
Bi1 0.01730 0.01100 0.01010 0.00190 0.00650 -0.00350
Bi2 0.01630 0.01320 0.00950 0.00490 0.00680 0.00800
Bi3 0.01750 0.01350 0.01600 -0.00190 0.00830 -0.00300
Bi4 0.02250 0.01260 0.00860 0.00060 0.00680 0.00360
Bi5 0.01440 0.01090 0.00630 -0.00330 0.00090 -0.00100
Bi6 0.01780 0.01460 0.01700 -0.00900 0.00560 0.00430
Bi7 0.01700 0.03700 0.04400 0.00000 0.01800 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
5.040 Å	(15)
3.220 Å	(100)
3.100 Å	(95)
2.931 Å	(25)
2.830 Å	(30)
2.502 Å	(25)
2.035 Å	(20)
1.875 Å	(20)

Locality:

La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Metropolitan City of Messina, Sicily, Italy

Comments:

From Type Description. The 3.220 Å peak coincides with a strong peak of anglesite (d = 3.223 Å).

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 7: Great Oxidation Event	<2.4
45a : [Sulfates, arsenates, selenates, antimonates]

Type Occurrence of LeguerniteHide

Type Locality:

ⓘ La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Metropolitan City of Messina, Sicily, Italy

General Appearance of Type Material:

needle-shaped crystals up to 0.4 mm long and 0.01 mm across, which form fibrous aggregates

Place of Conservation of Type Material:

Type material is deposited in the collections of the C.L. Garavelli Museum in the Dipartimento di Scienze della Terra e Geoambientali, Universita` degli Studi di Bari ‘‘Aldo Moro’’, Italy, sample number 18/nm-V28

Geological Setting of Type Material:

walls of the high-temperature fumarole FF (T = 600ºC, direct
measurement)

Associated Minerals at Type Locality:

Anglesite	Balićžunićite	Bismoclite	Galenobismutite	Lillianite
Pyrite	Pyrrhotite	Sphalerite	Wurtzite

Synonyms of LeguerniteHide

IMA2013-051

Other Language Names for LeguerniteHide

Dutch:Leguerniet

German:Leguernit

Related Minerals - Strunz-mindat Grouping Hide

7.A0.	Zincomenite	ZnSeO₃	Orth. mmm(2/m2/m2/m) : Pbca
7.A0.	Balićžunićite	Bi₂O(SO₄)₂	Tric. 1 : P1

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 LeguerniteHide

mindat.org URL:

https://www.mindat.org/min-43928.html
Please feel free to link to this page.

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External Links:

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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 LeguerniteHide

Reference List:

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No.17. Mineralogical Magazine, 77 (7) 2997-3005 doi:10.1180/minmag.2013.077.7.09

Garavelli, Anna, Pinto, Daniela, Mitolo, Donatella, Bindi, Luca (2014) Leguernite, Bi_12.67O₁₄(SO₄)₅, a new Bi oxysulfate from the fumarole deposit of La Fossa crater, Vulcano, Aeolian Islands, Italy. Mineralogical Magazine, 78 (7) 1629-1645 doi:10.1180/minmag.2014.078.7.07

(2016) Leguernite. Handbook of Mineralogy. Mineralogical Society of America

Localities for LeguerniteHide

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.

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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.

Italy (TL)

Sicily

Metropolitan City of Messina

Eolie Islands (Aeolian Islands)

Lipari

Vulcano Island

ⓘ La Fossa crater (TL)

Garavelli et al. (2014)

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Leguernite