7.DG.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H₂O
G : With large and medium-sized cations; with NO₃, CO₃, B(OH)₄, SiO₄ or IO₃

Dana 8th ed.:

32.4.6.1

32 : COMPOUND SULFATES
4 : Hydrated Compound Sulfates containing Hydroxyl or Halogen

Hey's CIM Ref.:

17.10.16

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

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
Cex	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 ChessexiteHide

Lustre:

Silky

Transparency:

Translucent

Colour:

White

Cleavage:

Poor/Indistinct
Indistinct parallel to [101]

Density:

2.21 g/cm³ (Calculated)

Optical Data of ChessexiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.456 n_β = 1.460 n_γ = 1.480

2V:

Measured: 47° , Calculated: 50°

Max Birefringence:

δ = 0.024

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Dispersion:

distinct

Chemistry of ChessexiteHide

Mindat Formula:

(Na,K)₄Ca₂(Mg,Zn)₃Al₈(SO₄)₁₀(SiO₄)₂ · 40H₂O

Elements listed:

Al, Ca, H, K, Mg, Na, O, S, Si, Zn - search for minerals with similar chemistry

Common Impurities:

Crystallography of ChessexiteHide

Crystal System:

Orthorhombic

Cell Parameters:

a = 13.70 Å, b = 27.96 Å, c = 9.99 Å

Ratio:

a:b:c = 0.49 : 1 : 0.357

Unit Cell V:

3,826.69 Å³ (Calculated from Unit Cell)

Morphology:

Euhedral, thin square or rectangular plates.

Comment:

Point Group: n.d.; Space Group: n.d.

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
13.91 Å	(100)
3.422 Å	(100)
4.85 Å	(90)
3.982 Å	(60)
3.451 Å	(40)
3.322 Å	(40)
2.908 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 7: Great Oxidation Event	<2.4
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]

Type Occurrence of ChessexiteHide

Type Locality:

ⓘ Maine Mine, Cordesse, Lucenay-l'Evêque, Autun, Saône-et-Loire, Bourgogne-Franche-Comté, France

General Appearance of Type Material:

euhedral, thin, square or rectangular plates, to 0.03 mm.

Place of Conservation of Type Material:

Natural History Museum, Geneva, Switzerland 435/70

Geological Setting of Type Material:

Coating on fluorite

Associated Minerals at Type Locality:

Gypsum

Fluorite

Reference:

Sarp, H., Deferne, J. (1982) La chessexite, un nouveau minéral. Schweizerische Mineralogische und Petrographische Mitteilungen: 62: 337-341.

Synonyms of ChessexiteHide

IMA1981-054

Other Language Names for ChessexiteHide

German:Chessexit

Spanish:Chessexita

Related Minerals - Strunz-mindat Grouping Hide

7.DG.	Mathesiusite	K₅(UO₂)₄(SO₄)₄(VO₅) · 4H₂O	Tet. 4/m : P4/n
7.DG.05	Darapskite	Na₃(SO₄)(NO₃) · H₂O	Mon. 2/m : P2₁/m
7.DG.10	Clinoungemachite	(Na, K, Fe, SO₄)	Mon. 2/m
7.DG.10	Humberstonite	Na₇K₃Mg₂(SO₄)₆(NO₃)₂ · 6H₂O	Trig. 3 : R3
7.DG.10	Ungemachite	K₃Na₈Fe(SO₄)₆(NO₃)₂ · 6H₂O	Trig. 3 : R3
7.DG.15	Bentorite	Ca₆Cr₂(SO₄)₃(OH)₁₂ · 26H₂O	Trig. 3m : P3 1c
7.DG.15	Charlesite	Ca₆(Al,Si)₂(SO₄)₂[B(OH)₄](OH,O)₁₂ · 26H₂O	Trig. 3m : P3 1c
7.DG.15	Ettringite	Ca₆Al₂(SO₄)₃(OH)₁₂ · 26H₂O	Trig. 3m : P3 1c
7.DG.15	Jouravskite	Ca₃Mn⁴⁺(SO₄)(CO₃)(OH)₆ · 12H₂O	Hex. 6 : P6₃
7.DG.15	Sturmanite	Ca₆Fe³⁺₂(SO₄)_2.5[B(OH)₄](OH)₁₂ · 25H₂O	Trig. 3m : P3 1c
7.DG.15	Thaumasite	Ca₃(SO₄)[Si(OH)₆](CO₃) · 12H₂O	Hex. 6 : P6₃
7.DG.15	Carraraite	Ca₃(SO₄)[Ge(OH)₆](CO₃) · 12H₂O	Hex.
7.DG.15	Buryatite	Ca₃(Si,Fe³⁺,Al)(SO₄)B(OH)₄(OH,O)₆ · 12H₂O	Trig. 3m : P3 1c
7.DG.15	Birunite	Ca₁₈(SiO₃)_8.5(CO₃)_8.5SO₄ · 15H₂O(?)
7.DG.15	Hielscherite	Ca₃Si(SO₄)(SO₃)(OH)₆ · 11H₂O	Hex. 6 : P6₃
7.DG.15	Kottenheimite	Ca₃Si(SO₄)₂(OH)₆ · 12H₂O	Hex. 6/m : P6₃/m
7.DG.15	Imayoshiite	Ca₃Al(CO₃)[B(OH)₄](OH)₆ · 12H₂O	Hex. 6 : P6₃
7.DG.15	Tatarinovite	Ca₃Al(SO₄)[B(OH)₄](OH)₆ · 12H₂O	Hex. 6 : P6₃
7.DG.15	Siwaqaite	Ca₆Al₂(CrO₄)₃(OH)₁₂ · 26H₂O	Trig. 3m : P3 1c
7.DG.15	Chiyokoite	Ca₃Si(CO₃)[B(OH)₄]O (OH)₅ · 12H₂O	Hex. 6 : P6₃
7.DG.20	Rapidcreekite	Ca₂(SO₄)(CO₃) · 4H₂O	Orth. mmm (2/m 2/m 2/m) : Pbcn
7.DG.25	Tatarskite	Ca₆Mg₂(SO₄)₂(CO₃)₂(OH)₄Cl₄ · 7H₂O	Orth.
7.DG.30	Nakauriite	Cu₈(SO₄)₄(CO₃)(OH)₆ · 48H₂O	Orth.
7.DG.40	Carlosruizite	K₆(Na,K)₄Na₆Mg₁₀(SeO₄)₁₂(IO₃)₁₂ · 12H₂O	Trig. 3m (3 2/m) : P3c1
7.DG.40	Fuenzalidaite	K₆(Na,K)₄Na₆Mg₁₀(SO₄)₁₂(IO₃)₁₂ · 12H₂O	Trig. 3m (3 2/m) : P3c1
7.DG.45	Chelyabinskite	(Ca,Mg)₃(SO₄,CO₃)₂[Si(OH)₆] · 9H₂O (?)	Orth.
7.DG.55	Ramazzoite	[Mg₈Cu₁₂(PO₄)(CO₃)₄(OH)₂₄(H₂O)₂₀][(H_0.33SO₄)₃(H₂O)₃₆]	Iso. 4 3m : P4 3m
7.DG.60	Witzkeite	Na₄K₄Ca(NO₃)₂(SO₄)₄ · 2H₂O	Mon. 2/m : B2/b

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 ChessexiteHide

mindat.org URL:

https://www.mindat.org/min-996.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 ChessexiteHide

Reference List:

Sarp, H., Deferne, J. (1982) La chessexite, un nouveau minéral. Schweizerische Mineralogische und Petrographische Mitteilungen: 62: 337-341.

Dunn, P.J., Cabri, L.J., Chao, G.Y., Fleischer, M., Francis, C.A., Grice, J.D., Jambor, J.L., Pabst, A. (1984) New mineral names. American Mineralogist: 69: 406.

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

Localities for ChessexiteHide

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.


France (TL)
Bourgogne-Franche-Comté Saône-et-Loire Autun Lucenay-l'Evêque Cordesse ⓘ Maine Mine (TL)	Sarp et al. (1982)

Iceland
Southern Region Vestmannaeyjar Vestmannaeyjar archipelago (Westman islands) Heimaey island ⓘ Eldfell	Mitolo et al. (2008)

USA
California Shasta County Klamath Mountains ⓘ Shasta Mining District	Livingston et al. (2005, December)

Chessexite

About ChessexiteHide

Unique IdentifiersHide

IMA Classification of ChessexiteHide

Classification of ChessexiteHide