Megakalsilite

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IMA Classification of MegakalsiliteHide

Classification of MegakalsiliteHide

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Physical Properties of MegakalsiliteHide

Optical Data of MegakalsiliteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.538(1) n_ε = 1.531(1)

Max Birefringence:

δ = 0.007

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

Surface Relief:

Low

Pleochroism:

Non-pleochroic

Chemistry of MegakalsiliteHide

Crystallography of MegakalsiliteHide

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)
0005778	Megakalsilite	Khomyakov A P, Nechelyustov G N, Sokolova E V, Bonaccorsi E, Merlino S, Pasero M (2002) Megakalsilite, a new polymorph of KAlSiO4 from the Khibina alkaline massif, Kola Peninsula, Russia: mineral description and crystal structure The Canadian Mineralogist 40 961-970		2002	Khibina alkaline massif, Kola Peninsula, Russia	0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Megakalsilite' loop_ _publ_author_name 'Khomyakov A P' 'Nechelyustov G N' 'Sokolova E V' 'Bonaccorsi E' 'Merlino S' 'Pasero M' _journal_name_full 'The Canadian Mineralogist' _journal_volume 40 _journal_year 2002 _journal_page_first 961 _journal_page_last 970 _publ_section_title ; Megakalsilite, a new polymorph of KAlSiO4 from the Khibina alkaline massif, Kola Peninsula, Russia: mineral description and crystal structure ; _database_code_amcsd 0005778 _chemical_compound_source 'Khibina alkaline massif, Kola Peninsula, Russia' _chemical_formula_sum 'Si Al K O4' _cell_length_a 18.1111 _cell_length_b 18.1111 _cell_length_c 8.4619 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 2403.743 _exptl_crystal_density_diffrn 2.622 _symmetry_space_group_name_H-M 'P 63' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,x,1/2+z' '-y,x-y,z' '-x,-y,1/2+z' '-x+y,-x,z' 'y,-x+y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Si(1) 0.83210 0.84060 0.19390 0.01100 Si(2) 0.66550 0.66520 0.79390 0.01060 Si(3) 0.65780 0.49400 0.17840 0.01110 Si(4) 0.50390 0.67750 0.17780 0.01160 Al(1) 0.83030 0.83810 0.81140 0.01080 Al(2) 0.66830 0.66820 0.18340 0.01100 Al(3) 0.65540 0.49150 0.79610 0.01090 Al(4) 0.50140 0.67610 0.79620 0.01100 K(1) 0.00000 0.00000 0.48620 0.02010 K(2) 0.66667 0.33333 0.50520 0.02080 K(3) 0.33333 0.66667 0.50480 0.02170 K(4) 0.47760 0.00470 0.49160 0.02300 K(5) 0.66650 0.81260 0.49460 0.02350 K(6) 0.80490 0.66750 0.49560 0.02330 O(1) 0.81610 0.85330 0.01010 0.01750 O(2) 0.66990 0.66500 0.98240 0.01980 O(3) 0.62720 0.47780 0.99510 0.01550 O(4) 0.51640 0.70650 0.99400 0.01710 O(5) 0.93080 0.86710 0.21780 0.01720 O(6) 0.73650 0.46760 0.77140 0.01630 O(7) 0.80090 0.39600 0.27240 0.01510 O(8) 0.90750 0.80840 0.79990 0.01830 O(9) 0.52500 0.76630 0.68520 0.01780 O(10) 0.43610 0.57710 0.18950 0.01930 O(11) 0.77020 0.74200 0.25070 0.01550 O(12) 0.89810 0.59480 0.75190 0.01600 O(13) 0.92560 0.35850 0.25580 0.01510 O(14) 0.35870 0.92970 0.73380 0.01610 O(15) 0.59440 0.90660 0.22530 0.01550 O(16) 0.73480 0.75840 0.72580 0.01680 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 Si(1) 0.01080 0.00990 0.01190 0.00490 -0.00060 0.00070 Si(2) 0.01060 0.01040 0.01090 0.00520 -0.00070 0.00040 Si(3) 0.01100 0.01020 0.01200 0.00520 0.00100 -0.00040 Si(4) 0.01180 0.01030 0.01260 0.00550 0.00010 -0.00160 Al(1) 0.01060 0.01060 0.01120 0.00520 0.00010 0.00170 Al(2) 0.01150 0.01080 0.01070 0.00550 -0.00020 0.00020 Al(3) 0.01220 0.01110 0.01050 0.00660 0.00020 -0.00010 Al(4) 0.01020 0.01040 0.01200 0.00500 0.00090 0.00060 K(1) 0.02060 0.02060 0.01920 0.01030 0.00000 0.00000 K(2) 0.02040 0.02040 0.02180 0.01020 0.00000 0.00000 K(3) 0.02090 0.02090 0.02330 0.01050 0.00000 0.00000 K(4) 0.02910 0.02130 0.02080 0.01410 -0.00070 0.00210 K(5) 0.02380 0.02640 0.01990 0.01230 0.00230 0.00070 K(6) 0.02290 0.02290 0.02400 0.01130 0.00390 0.00720 O(1) 0.01880 0.02000 0.01500 0.01060 -0.00110 -0.00080 O(2) 0.02780 0.02010 0.01210 0.01250 -0.00030 -0.00150 O(3) 0.01500 0.01710 0.01430 0.00780 -0.00030 0.00250 O(4) 0.02030 0.01590 0.01350 0.00790 0.00030 -0.00230 O(5) 0.01300 0.01670 0.02210 0.00740 -0.00220 0.00400 O(6) 0.01310 0.01670 0.02040 0.00830 0.00620 0.00360 O(7) 0.01520 0.01150 0.01930 0.00730 0.00360 -0.00060 O(8) 0.01990 0.02310 0.01660 0.01420 0.00530 0.00380 O(9) 0.01870 0.01880 0.02020 0.01270 0.00720 0.00650 O(10) 0.01980 0.01160 0.02270 0.00490 0.00520 -0.00110 O(11) 0.01480 0.01280 0.01730 0.00590 -0.00430 0.00020 O(12) 0.01380 0.01620 0.01370 0.00420 0.00240 -0.00280 O(13) 0.01560 0.02280 0.01190 0.01350 -0.00290 -0.00280 O(14) 0.01900 0.01220 0.01880 0.00920 0.00400 0.00260 O(15) 0.01080 0.01310 0.01750 0.00230 0.00170 -0.00390 O(16) 0.01720 0.01500 0.01590 0.00620 -0.00240 -0.00050

Geological EnvironmentHide

Type Occurrence of MegakalsiliteHide

Synonyms of MegakalsiliteHide

Other Language Names for MegakalsiliteHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of MegakalsiliteHide

Other InformationHide

Internet Links for MegakalsiliteHide

References for MegakalsiliteHide

Reference List:

McGuire, Meaghan Clark, Ivor Bull, and Geoffrey Mark Johnson. "Synthetic Megakalsilite via Hydrothermal Preparation." U.S. Patent Application 14/204,079, filed September 11, 2014.

Khomyakov, A. P., Nechelyustov, G. N., Sokolova, E., Bonaccorsi, E., Merlino, S., Pasero, M. (2002) Megakalsilite, a new polymorph of KAlSiO₄ from the Khibina Alkaline Massif, Kola Peninsula, Russia: mineral description and crystal structure. The Canadian Mineralogist, 40 (3) 961-970 doi:10.2113/gscanmin.40.3.961

Localities for MegakalsiliteHide

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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

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- 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.

Russia (TL)
Murmansk Oblast Khibiny Massif Koashva Mt ⓘ Koashva Open Pit (TL)	Can Min (2002) 40, (3), 961-970 Khomyakov, A. P., Nechelyustov, G. N., Sokolova, E., Bonaccorsi, E., Merlino, S., Pasero, M. (2002) Megakalsilite, a new polymorph of KAlSiO4 from the Khibina Alkaline Massif, Kola Peninsula, Russia: mineral description and crystal structure. The Canadian Mineralogist, 40 (3) 961-970 doi:10.2113/gscanmin.40.3.961