Chayesite

Chayesite

Sierra de las Cabras, Cancarix lamproite intrusion, Hellín, Albacete, Castile-La Mancha, Spain

Chayesite, etc.

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chayesite

Sierra de las Cabras, Cancarix lamproite intrusion, Hellín, Albacete, Castile-La Mancha, Spain

Chayesite

Sierra de las Cabras, Cancarix lamproite intrusion, Hellín, Albacete, Castile-La Mancha, Spain

Chayesite, etc.

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chayesite

Sierra de las Cabras, Cancarix lamproite intrusion, Hellín, Albacete, Castile-La Mancha, Spain

Chayesite

Sierra de las Cabras, Cancarix lamproite intrusion, Hellín, Albacete, Castile-La Mancha, Spain

Chayesite, etc.

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

About ChayesiteHide

Felix Chayes

Formula:

K◻₂Mg₂(Mg₂Fe³⁺)[Si₁₂O₃₀]

some Fe²⁺ reported in the A site (dominated by Mg in the end-member formula)

Colour:

Blue, brown, red

Lustre:

Vitreous

Hardness:

5 - 6

Specific Gravity:

2.68 (Calculated)

Crystal System:

Hexagonal

Member of:

Osumilite Group

Name:

Named in honor of Felix Chayes (10 May 1916, New York, New York, USA - 28 February 1993, Kensington, Maryland, USA), petrologist and mathematical geologist at Carnegie Institution's Geophysical Laboratory, Washington, D.C. He was also president of the Mineralogical Society of America.

Type Locality:

ⓘ Moon Canyon, Woodland, Summit County, Utah, USA

Osumilite Group.

Unique IdentifiersHide

IMA Classification of ChayesiteHide

Classification of ChayesiteHide

Mineral SymbolsHide

Physical Properties of ChayesiteHide

Optical Data of ChayesiteHide

Type:

Uniaxial (+)

RI values:

n_ω = 1.575(1) n_ε = 1.578(1)

Max Birefringence:

δ = 0.003

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

Surface Relief:

Low

Pleochroism:

Strong

Comments:

O= sky blue
E= colorless

Chemistry of ChayesiteHide

Crystallography of ChayesiteHide

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)
0013386	Chayesite	Nguyen N, Choisnet J, Raveau B (1980) Silicates synthetiques a structure milarite Journal of Solid State Chemistry 34 1-9		1980	synthetic	0	293
0014509	Chayesite	Alietti E, Brigatti M F, Capedri S, Poppi L (1994) The roedderite-chayesite series from Spanish lamproites: crystal chemical characterization Mineralogical Magazine 58 655-662		1994	Cancarix, Albacete province, Spain	0	293
0014511	Chayesite	Alietti E, Brigatti M F, Capedri S, Poppi L (1994) The roedderite-chayesite series from Spanish lamproites: crystal chemical characterization Mineralogical Magazine 58 655-662		1994	Cancarix, Albacete province, Spain	0	293
0014512	Chayesite	Alietti E, Brigatti M F, Capedri S, Poppi L (1994) The roedderite-chayesite series from Spanish lamproites: crystal chemical characterization Mineralogical Magazine 58 655-662		1994	Cancarix, Albacete province, Spain	0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Chayesite' loop_ _publ_author_name 'Nguyen N' 'Choisnet J' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 34 _journal_year 1980 _journal_page_first 1 _journal_page_last 9 _publ_section_title ; Silicates synthetiques a structure milarite ; _database_code_amcsd 0013386 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K2 (Mg3 Fe2) Si12 O30' _cell_length_a 10.22 _cell_length_b 10.22 _cell_length_c 14.176 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 1282.290 _exptl_crystal_density_diffrn 2.797 _symmetry_space_group_name_H-M 'P 6/m c c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,-z' 'x-y,x,z' '-y,-x,1/2+z' 'y,x,1/2-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,-z' '-x,-y,z' 'x,x-y,1/2+z' '-x,-x+y,1/2-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,-z' 'y,-x+y,z' '-x+y,y,1/2+z' 'x-y,-y,1/2-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 KA1 0.00000 0.00000 0.25000 1.00000 0.01013 KA2 0.33333 0.66667 0.00000 0.50000 0.00760 MgM1 0.33333 0.66667 0.25000 0.80000 0.02026 FeM1 0.33333 0.66667 0.25000 0.20000 0.02026 MgM2 0.50000 0.00000 0.25000 0.46670 0.01646 FeM2 0.50000 0.00000 0.25000 0.53330 0.01646 Si 0.76300 0.11000 0.11400 1.00000 0.01393 O1 0.73800 0.11600 0.00000 1.00000 0.00127 O2 0.93600 0.20700 0.13600 1.00000 0.00127 O3 0.65100 0.15200 0.16600 1.00000 0.01013

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Type Occurrence of ChayesiteHide

Synonyms of ChayesiteHide

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Relationship of Chayesite to other SpeciesHide

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Related Minerals - Strunz-mindat GroupingHide

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References for ChayesiteHide

Localities for ChayesiteHide

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.

Austria
Burgenland Oberpullendorf District Markt Sankt Martin Pauliberg ⓘ Basalt quarry	O Dziallas collection +1 other reference
Styria Südoststeiermark District Bad Gleichenberg Wilhelmsdorf ⓘ Stradner Kogel	Postl et al. (2019)
France
Auvergne-Rhône-Alpes Haute-Loire Le Puy-en-Velay Espaly-Saint-Marcel ⓘ Mont Denise	Médard E et al. (2012)
Germany
Rhineland-Palatinate Mayen-Koblenz Vordereifel Ettringen ⓘ Caspar quarry	Schäfer (2016)
Spain
Castile-La Mancha Albacete Hellín ⓘ Cancarix lamproite intrusion	Venturelli et al. (1984) +2 other references
ⓘ Sierra de las Cabras	Lapis 2003 (1)
USA (TL)
Utah Summit County Woodland ⓘ Moon Canyon (TL)	Velde et al. (1989) +2 other references