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Cossaite

A valid IMA mineral species

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Photos of Cossaite (2)

Search Photos of Cossaite

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Cossaite, etc.

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

Cossaite, etc.

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

Cossaite, etc.

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

Cossaite, etc.

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

Cossaite, etc.

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

Cossaite, etc.

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

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About CossaiteHide

Alfonso Cossa

Formula:

(Mg_0.5,◻)Al₆(SO₄)₆(HSO₄)F₆ · 36H₂O

The earlier proposed formula NaAl6(SO4)6(SO3F)F6.36H2O is false (see Demartin et al., 2011).

Colour:

Colourless

Lustre:

Vitreous

Specific Gravity:

2.08

Crystal System:

Trigonal

Name:

Named by Francesco Demartin, Carlo Maria Gramaccioli, Italo Campostrini, and C. Castellano in 2011 in honor of Alfonso Cossa (3 November 1833, Milan, Italy - 23 October 1902, Turin, Italy), for his work on the minerals and rocks of Vulcano.
[http://www.platinummetalsreview.com/pdf/pmr-v34-i4-215-221.pdf]

Type Locality:

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

This page provides mineralogical data about Cossaite.

Unique IdentifiersHide

Mindat ID:

39568

Long-form identifier:

mindat:1:1:39568:5

GUID
(UUID V4):

f13183ab-a22a-4147-beca-dcc1cad703ef

IMA Classification of CossaiteHide

IMA status:

Approved

IMA Formula:

(Mg_0.5,◻)Al₆(SO₄)₆(HSO₄)F₆ · 36H₂O

Approval year:

2009

Classification of CossaiteHide

Strunz-mindat (2024):

7.DE.

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H₂O
E : With only medium-sized cations; unclassified

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
Css	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 CossaiteHide

Lustre:

Vitreous

Transparency:

Translucent

Colour:

Colourless

Streak:

White

Tenacity:

Brittle

Fracture:

Irregular/Uneven

Density:

2.08(1) g/cm³ (Measured) 2.075 g/cm³ (Calculated)

Chemistry of CossaiteHide

Mindat Formula:

(Mg_0.5,◻)Al₆(SO₄)₆(HSO₄)F₆ · 36H₂O

The earlier proposed formula NaAl6(SO4)6(SO3F)F6.36H2O is false (see Demartin et al., 2011).

Elements listed:

Al, F, H, Mg, O, S - search for minerals with similar chemistry

Crystallography of CossaiteHide

Crystal System:

Trigonal

Class (H-M):

3 - Rhombohedral

Space Group:

Cell Parameters:

a = 22.023(2) Å, c = 9.237(2) Å

Ratio:

a:c = 1 : 0.419

Unit Cell V:

3,879.85 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)
0018525	Cossaite	Demartin F, Gramaccioli C M, Campostrini I, Castellano C (2011) Cossaite, (Mg0.5,_)Al6(SO4)6(HSO4)F636H2O, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy* Mineralogical Magazine 75 2847-2855		2011	La Fossa crater, Vulcano, Aeolian Islands, Italy	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Cossaite'
loop_
_publ_author_name
'Demartin F'
'Gramaccioli C M'
'Campostrini I'
'Castellano C'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 75 
_journal_year 2011
_journal_page_first 2847
_journal_page_last 2855
_publ_section_title
;
 Cossaite, (Mg0.5,_)Al6(SO4)6(HSO4)F6*36H2O, a new mineral
 from La Fossa crater, Vulcano, Aeolian Islands, Italy
 Note: H atom in HSO4 group was not located
;
_database_code_amcsd 0018525
_chemical_compound_source 'La Fossa crater, Vulcano, Aeolian Islands, Italy'
_chemical_formula_sum 'Mg.5 Al6 S7 O64 F6 H72'
_cell_length_a 22.010
_cell_length_b 22.010
_cell_length_c 9.238
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 3875.687
_exptl_crystal_density_diffrn      2.068
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-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
Mg   0.33333   0.66667   1.16667   0.50000   0.08400
Al   0.37501   0.87307   0.35346   1.00000   0.01662
S1   0.21195   0.95870   0.16739   1.00000   0.01769
S2   0.33333   0.66667   0.69198   0.50000   0.02110
O1   0.14732   0.95419   0.22260   1.00000   0.03510
O2   0.24997   0.02178   0.07647   1.00000   0.03800
O3   0.19434   0.89589   0.08023   1.00000   0.02500
O4   0.25714   0.96364   0.28903   1.00000   0.02870
O5   0.33333   0.66667   0.85110   0.50000   0.05600
O6   0.30686   0.71231   0.64010   0.50000   0.03490
F   0.32848   0.79736   0.24892   1.00000   0.03190
Ow1   0.45582   0.90169   0.23929   1.00000   0.02630
Ow2   0.34841   0.92446   0.23172   1.00000   0.02720
Ow3   0.42288   0.95598   0.46392   1.00000   0.02410
Ow4   0.40817   0.82981   0.48384   1.00000   0.03680
Ow5   0.29490   0.84390   0.47033   1.00000   0.02580
Wat6   0.34139   0.74857   0.02900   1.00000   0.03820
H1a   0.46060   0.86810   0.18440   1.00000   0.06700
H1b   0.49920   0.94370   0.24100   1.00000   0.06300
H2a   0.35790   0.93680   0.13260   1.00000   0.10600
H2b   0.31070   0.93270   0.24700   1.00000   0.09500
H3a   0.43160   0.96530   0.56390   1.00000   0.06000
H3b   0.42180   0.99880   0.45400   1.00000   0.07300
H4a   0.37220   0.79270   0.53600   1.00000   0.11000
H4b   0.45160   0.83110   0.47400   1.00000   0.12100
H5a   0.25770   0.79730   0.46100   1.00000   0.05400
H5b   0.29250   0.86320   0.55960   1.00000   0.05700
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
Mg 0.04550 0.04550 0.16100 0.02280 0.00000 0.00000
Al 0.01410 0.01880 0.01610 0.00750 -0.00010 0.00050
S1 0.01890 0.01910 0.01680 0.01080 -0.00220 -0.00140
S2 0.01950 0.01950 0.02410 0.00980 0.00000 0.00000
O1 0.02360 0.04080 0.04630 0.02020 -0.00240 -0.01540
O2 0.04710 0.02050 0.02730 0.00260 -0.00990 0.00420
O3 0.03720 0.02320 0.01900 0.01850 0.00170 -0.00320
O4 0.03180 0.04830 0.01640 0.02790 -0.00560 -0.00530
O5 0.06670 0.06670 0.03440 0.03340 0.00000 0.00000
O6 0.03590 0.03370 0.04310 0.02330 0.00440 0.00630
F 0.02720 0.02390 0.03780 0.00780 0.00230 -0.00940
Ow1 0.02070 0.02500 0.02900 0.00820 0.00920 -0.00160
Ow2 0.03690 0.04280 0.01600 0.03040 0.00210 0.00430
Ow3 0.02800 0.02240 0.01630 0.00850 -0.00210 -0.00170
Ow4 0.02620 0.05020 0.04100 0.02420 0.00590 0.02290
Ow5 0.01780 0.03260 0.02150 0.00860 0.00520 0.00060
Wat6 0.04800 0.04690 0.03150 0.03260 -0.00960 -0.01200

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
10.997 Å	(50)
4.584 Å	(25)
4.152 Å	(100)
3.873 Å	(70)
2.770 Å	(20)
2.345 Å	(17)
2.166 Å	(20)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 7: Great Oxidation Event	<2.4
45a : [Sulfates, arsenates, selenates, antimonates]
45b : [Other oxidized fumarolic minerals]
47a : [Near-surface hydration of prior minerals]

Type Occurrence of CossaiteHide

Type Locality:

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

General Appearance of Type Material:

Stout prismatic crystals up to 0.1 mm in size, which are terminated by rhombohedral faces.

Place of Conservation of Type Material:

Reference Collection of the Dipartimento di Chimica Strutturale e Stereochimica Inorganica at the Universita degli Studi di Milano, Italy (catalogue No. 2009-1).

Geological Setting of Type Material:

Cossaite was found on altered pyroclastic breccia at the F5AT medium-temperature fumarole (T ~350ºC), which is located at the rim of La Fossa crater.

Synonyms of CossaiteHide

IMA2009-031

Common AssociatesHide

Associated Minerals Based on Photo Data:

2 photos of Cossaite associated with Thermessaite

K₂AlF₃(SO₄)

Related Minerals - Strunz-mindat Grouping Hide

7.DE.	Magnesioalterite	Mg₂Fe³⁺₄(SO₄)₄(C₂O₄)₂(OH)₄ · ₁₇H₂O	Mon. 2/m : B2/b
7.DE.	Liangjunite	K₂(Mo₂O₅)(SO₄)₂ · 3H₂O	Tric. 1 : P1
7.DE.	Fabritzite	Zn₉(SO₄)₂(OH)₁₂Cl₂ · 6H₂O	Trig. 3 : R3
7.DE.	Downsite	K₂(MoO₃)₃(SO₄) · 4H₂O	Mon. 2/m : B2/m
7.DE.05	Mangazeite	Al₂(SO₄)(OH)₄ · 3H₂O	Tric.
7.DE.10	Carbonatecyanotrichite	Cu₄Al₂(CO₃,SO₄)(OH)₁₂ · 2H₂O	Mon. 2/m : B2/m
7.DE.10	Cyanotrichite	Cu₄Al₂(SO₄)(OH)₁₂ · 2H₂O	Mon. 2/m : B2/m
7.DE.10	UKI-1975-(SO:AlCu)	(Cu, Al, SO₄, H₂O)
7.DE.15	Schwertmannite	Fe³⁺₁₆(OH,SO₄)_12-13O₁₆ · 10-12H₂O	Tet.
7.DE.20	Tlalocite	Cu₁₀Zn₆(Te⁶⁺O₄)₂(Te⁴⁺O₃)(OH)₂₅Cl · 27H₂O	Orth.
7.DE.25	Utahite	MgCu₄Zn₂Te⁶⁺₃O₁₄(OH)₄ · 6H₂O	Tric. 1 : P1
7.DE.35	Coquandite	Sb_6+xO_8+x(SO₄)(OH)_x(H₂O)_{1- x} (x = 0.3)	Tric. 1 : P1
7.DE.40	Osakaite	Zn₄(SO₄)(OH)₆ · 5H₂O	Tric. 1 : P1
7.DE.42	Alterite	Zn₂Fe³⁺₄(SO₄)₄(C₂O₄)₂(OH)₄ · 17H₂O	Mon. 2/m : B2/b
7.DE.45	Wilcoxite	MgAl(SO₄)₂F · 17H₂O	Tric. 1 : P1
7.DE.45	Barrotite	Cu₉Al(HSiO₄)₂[(SO₄)(HAsO₄)_0.5](OH)₁₂ · 8H₂O	Trig. 3
7.DE.47	Tiberiobardiite	{Cu₉Al[SiO₃(OH)]₂(OH)₁₂(H₂O)₆}(SO₄)_1.5 · 10H₂O	Trig. 3 : R3
7.DE.50	Stanleyite	(V⁴⁺O)(SO₄) · 6H₂O	Orth.
7.DE.50	Bouškaite	(MoO₂)₂O(SO₃OH)₂(H₂O)₄	Tric. 1 : P1
7.DE.57	Khangalasite	Fe(SO₄)(OH) · 2H₂O	Tric.
7.DE.60	Hydrobasaluminite	Al₄(SO₄)(OH)₁₀ · 12-36H₂O	Mon.
7.DE.62	Volaschioite	Fe₄(SO₄)O₂(OH)₆ · 2H₂O	Mon. 2/m : B2/m
7.DE.65	Zaherite	Al₁₂(SO₄)₅(OH)₂₆ · 20H₂O	Tric.
7.DE.75	Camérolaite	Cu₆Al₃(OH)₁₈(H₂O)₂[Sb(OH)₆](SO₄)	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 CossaiteHide

mindat.org URL:

https://www.mindat.org/min-39568.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

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References for CossaiteHide

Reference List:

Campostrini, I., Demartin, F., Gramaccioli, C.M. (2010) Vulcano: ein außergewöhnlicher Fundpunkt von neuen und seltenen Mineralien. Mineralien-Welt: 21: 40-57. (in German)

Campostrini, I., Demartin, F., Gramaccioli, C. M., Russo, M. (2011) Vulcano - Tre secoli di mineralogia. Associazione Micro-mineralogica Italiana, Cremona, Italy.

Demartin, F., Gramaccioli, C. M., Campostrini, I., Castellano, C. (2011) Cossaite, (Mg_0.5,☐)Al₆(SO₄)₆(HSO₄)F₆·36H₂O, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy. Mineralogical Magazine, 75 (6) 2847-2855 doi:10.1180/minmag.2011.075.6.2847

Camara, F., Gatta, G. D., Belakovskiy, D., Smith, D. G. W., Tait, K. T. (2013) New Mineral Names. American Mineralogist, 98 (5) 1078-1083 doi:10.2138/am.2013.616

(2023) Cossaite. Handbook of Mineralogy. Mineralogical Society of America

Localities for CossaiteHide

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.

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)

Campostrini et al. (2010) +1 other reference

Cossaite

About CossaiteHide

Unique IdentifiersHide

IMA Classification of CossaiteHide

Classification of CossaiteHide

Mineral SymbolsHide

Physical Properties of CossaiteHide

Chemistry of CossaiteHide

Crystallography of CossaiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of CossaiteHide

Synonyms of CossaiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for CossaiteHide

References for CossaiteHide

Localities for CossaiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide