Compare Unnamed (Ca-Al-(Si) oxide I), Unnamed (Ca-Al-(Si) oxide II), Unnamed (Ca-Al-(Si) oxide III), Unnamed (Ca-Al-(Si) oxide IV) and Unnamed (Ca-Al-Si oxide) - terrestrial phases also connected with high pressures.

Present as shocked crystal fragments and within devitrifed glasses in lunar regolith breccia. The glass may be due to shock melting of anorthite on ancient lunar highlands.

Metastable.

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Unique IdentifiersHide

Mindat ID:

4366

Long-form identifier:

mindat:1:1:4366:9

IMA Classification of YoshiokaiteHide

IMA status:

Approved

IMA Formula:

Ca_1-x(Al,Si)₂O₄

Approval year:

1989

First published:

1990

Type description reference:

Vaniman, David T., Bish, David L. (1990) Yoshiokaite, a new Ca,Al-silicate mineral from the Moon. American Mineralogist, 75 (5-6) 676-686

Classification of YoshiokaiteHide

Strunz-mindat (2026):

9.FA.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H₂O
A : Tektosilicates without additional non-tetrahedral anions

Dana 8th ed.:

76.2.1.6

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

Hey's CIM Ref.:

16.9.3

16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca

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
Yos	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 YoshiokaiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Colourless (white?)

Comment:

Semitransparent

Streak:

White

Cleavage:

Poor/Indistinct
{101}

Optical Data of YoshiokaiteHide

Type:

Uniaxial (+)

RI values:

n_ω = 1.56 - 1.58 n_ε = 1.62 - 1.64

Max. Birefringence:

δ = 0.060
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Thickness: 30 µm

Rotation:

Surface Relief:

Moderate

Chemistry of YoshiokaiteHide

Mindat Formula:

(Ca,Na)[Al(Al,Si)O₄]

Element Weights:

Element	% weight
O	40.495 %
Al	34.146 %
Ca	25.360 %

Calculated from ideal end-member formula.

Elements listed:

Al, Ca, Na, O, Si - search for minerals with similar chemistry

Common Impurities:

Ti,Fe,Mg,Na,K

Crystallography of YoshiokaiteHide

Crystal System:

Trigonal

Class (H-M):

3 - Rhombohedral

Space Group:

Cell Parameters:

a = 9.939 Å, c = 8.245 Å

Ratio:

a:c = 1 : 0.83

Unit Cell V:

705.35 Å³ (Calculated from Unit Cell)

Comment:

space group not sure

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)
0001330	Yoshiokaite	Steele I M, Pluth J J (1990) Crystal structure of synthetic yoshiokaite, a stuffed derivative of the tridymite structure American Mineralogist 75 1186-1191		1990		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Yoshiokaite'
loop_
_publ_author_name
'Steele I M'
'Pluth J J'
_journal_name_full 'American Mineralogist'
_journal_volume 75 
_journal_year 1990
_journal_page_first 1186
_journal_page_last 1191
_publ_section_title
;
 Crystal structure of synthetic yoshiokaite, a stuffed derivative of the
 tridymite structure
;
_database_code_amcsd 0001330
_chemical_formula_sum 'Si2.65 Al5.35 O16 Ca2.676'
_cell_length_a 9.927
_cell_length_b 9.927
_cell_length_c 8.220
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 701.517
_exptl_crystal_density_diffrn      2.755
_symmetry_space_group_name_H-M 'P -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'y,-x+y,-z'
  '-x+y,-x,z'
  '-x,-y,-z'
  '-y,x-y,z'
  'x-y,x,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Si1   0.67620   0.75715  -0.06751   0.33100
Al1   0.67620   0.75715  -0.06751   0.66900
Si2   0.75703   0.67636   0.56732   0.33100
Al2   0.75703   0.67636   0.56732   0.66900
Si3   0.33333   0.66667   0.96180   0.16600
Al3   0.33333   0.66667   0.96180   0.33400
Si3*   0.33333   0.66667   0.04210   0.16600
Al3*   0.33333   0.66667   0.04210   0.33400
Si4   0.33333   0.66667   0.54070   0.16600
Al4   0.33333   0.66667   0.54070   0.33400
Si4*   0.33333   0.66667   0.46060   0.16600
Al4*   0.33333   0.66667   0.46060   0.33400
O1   0.28160   0.05670   0.07620   1.00000
O2   0.05560   0.28140   0.42410   1.00000
O3   0.51340   0.35600   0.00280   1.00000
O4   0.35560   0.51320   0.49570   1.00000
O5   0.68270   0.00040   0.25080   1.00000
O6   0.33333   0.66667   0.25010   0.50000
O6*   0.66667   0.33333   0.25730   0.50000
Ca   0.44328   0.00004   0.25008   0.89200
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
Si1 0.00790 0.00870 0.01080 0.00480 0.00020 -0.00090
Al1 0.00790 0.00870 0.01080 0.00480 0.00020 -0.00090
Si2 0.00860 0.00790 0.01110 0.00460 0.00100 -0.00020
Al2 0.00860 0.00790 0.01110 0.00460 0.00100 -0.00020
Si3 0.00720 0.00720 0.02700 0.00360 0.00000 0.00000
Al3 0.00720 0.00720 0.02700 0.00360 0.00000 0.00000
Si3' 0.00540 0.00540 0.00700 0.00270 0.00000 0.00000
Al3' 0.00540 0.00540 0.00700 0.00270 0.00000 0.00000
Si4 0.00460 0.00460 0.00830 0.00230 0.00000 0.00000
Al4 0.00460 0.00460 0.00830 0.00230 0.00000 0.00000
Si4' 0.00850 0.00850 0.02500 0.00425 0.00000 0.00000
Al4' 0.00850 0.00850 0.02500 0.00425 0.00000 0.00000
O1 0.01890 0.01610 0.01470 0.00920 0.00140 -0.00020
O2 0.01640 0.01810 0.01500 0.00900 -0.00150 -0.00190
O3 0.01290 0.01530 0.06000 0.00750 0.00880 0.00990
O4 0.01600 0.01290 0.06200 0.00740 -0.01110 -0.01160
O5 0.01930 0.02000 0.01740 0.01040 -0.00030 0.00130
O6 0.04200 0.04200 0.02000 0.02100 0.00000 0.00000
O6' 0.04700 0.04700 0.02100 0.02350 0.00000 0.00000
Ca 0.01920 0.04250 0.01510 0.02140 -0.00230 -0.00430

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
8.57 Å	(100)
2.979 Å	(91)
3.718 Å	(79)
2.871 Å	(78)
1.158 Å	(51)
2.062 Å	(41)
4.123 Å	(36)

Locality:

Fra Mauro Base (Apollo 14 landing site), Fra Mauro Highlands, The Moon

Reference:

Vaniman, David T., Bish, David L. (1990) Yoshiokaite, a new Ca,Al-silicate mineral from the Moon. American Mineralogist, 75 (5-6) 676-686

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 2: Planetesimal differentiation and alteration	4.566-4.550
6 : Secondary asteroid phases	4.566-4.560

Type Occurrence of YoshiokaiteHide

Type Locality:

ⓘ Fra Mauro Base (Apollo 14 landing site), Fra Mauro Highlands, The Moon

General Appearance of Type Material:

strongly fractured, angular, anhedral crystals, up to 235 microns in size; likely shock-induced sets of {201} and {200} lamellae

Place of Conservation of Type Material:

A part of regolith breccia 14076, is supervised by the lunar sample curator, NASA Johnson Space Center, Houston, Texas.

Geological Setting of Type Material:

lunar regolith breccia (near Apollo 14 landing site)

Associated Minerals at Type Locality:

'Glass'

Reference:

Vaniman, David T., Bish, David L. (1990) Yoshiokaite, a new Ca,Al-silicate mineral from the Moon. American Mineralogist, 75 (5-6) 676-686

Synonyms of YoshiokaiteHide

IMA1989-043

Other Language Names for YoshiokaiteHide

Dutch:Yoshiokaiet

German:Yoshiokait

Russian:Иошиокаит

Spanish:Yoshiokaita

Relationship of Yoshiokaite to other SpeciesHide

Member of:

Feldspathoid Group

Other Members of Feldspathoid:

Cancrinite Group	A large, structurally complex group of alumosilicates.
'Carnegieite'	NaAlSiO₄	Tric.
Davidsmithite	(Ca,◻)₂Na₆Al₈Si₈O₃₂	Hex. 6 : P6₃
Kalsilite	KAlSiO₄	Hex. 622 : P6₃22
'Metaleucite'	A name for isometric leucite that is stable above 625 degrees C.
Nepheline	Na₃K(Al₄Si₄O₁₆)	Hex. 6 : P6₃
Sodalite Group	The Sodalite Group is characterised by sodalite-type stacking of alumosilicate building units that produces Cubo ...
Trikalsilite	K₂NaAl₃(SiO₄)₃	Hex. 6 : P6₃
Trinepheline	NaAlSiO₄	Hex. 6 : P6₁

Related Minerals - Strunz-mindat Grouping Hide

9.FA.	Bonaccorsiite	KK₂Na₃(Al₆Si₃₆)O₈₄	Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.FA.	Hexacelsian	BaAl₂Si₂O₈	Hex. 6/mmm(6/m2/m2/m) : P6₃/mcm
9.FA.	Wodegongjieite	KCa₃(Al₇Si₉)O₃₂	Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.FA.05	Panunzite	(K,Na)AlSiO₄	Hex. 6 : P6₃
9.FA.05	Nepheline	Na₃K(Al₄Si₄O₁₆)	Hex. 6 : P6₃
9.FA.05	Trinepheline	NaAlSiO₄	Hex. 6 : P6₁
9.FA.05	Davidsmithite	(Ca,◻)₂Na₆Al₈Si₈O₃₂	Hex. 6 : P6₃
9.FA.05	Kaliophilite	KAlSiO₄	Trig. 3 : P3
9.FA.05	Kalsilite	KAlSiO₄	Hex. 622 : P6₃22
9.FA.05	'Carnegieite'	NaAlSiO₄	Tric.
9.FA.05	Megakalsilite	KAlSiO₄	Hex. 6 : P6₃
9.FA.05	Trikalsilite	K₂NaAl₃(SiO₄)₃	Hex. 6 : P6₃
9.FA.10	Malinkoite	NaBSiO₄	Hex. 6 : P6₃
9.FA.15	Virgilite	LiAlSi₂O₆	Hex. 622 : P6₂22
9.FA.25	Lisitsynite	KBSi₂O₆	Orth. 222 : P222
9.FA.30	Ferrisanidine	K[Fe³⁺Si₃O₈]	Mon. 2/m : B2/m
9.FA.30	Buddingtonite	(NH₄)(AlSi₃O₈)	Mon. 2 : P2₁
9.FA.30	Rubicline	Rb(AlSi₃O₈)	Mon. 2/m : B2/m
9.FA.30	'Monalbite'	NaAlSi₃O₈	Mon. 2/m : B2/m
9.FA.30	Microcline	K(AlSi₃O₈)	Tric. 1
9.FA.30 va	'Germanate-celsian'	BaAl₂Ge₂O₈
9.FA.30	Celsian	Ba(Al₂Si₂O₈)	Mon. 2/m
9.FA.30	Sanidine	K(AlSi₃O₈)	Mon. 2/m : B2/m
9.FA.30	Orthoclase	K(AlSi₃O₈)	Mon. 2/m : B2/m
9.FA.35	Reedmergnerite	NaBSi₃O₈	Tric. 1 : P1
9.FA.35	Albite	Na(AlSi₃O₈)	Tric. 1
9.FA.35	Anorthite	Ca(Al₂Si₂O₈)	Tric. 1 : P1
9.FA.40	Paracelsian	Ba(Al₂Si₂O₈)	Mon. 2/m : P2₁/b
9.FA.45	Svyatoslavite	Ca(Al₂Si₂O₈)	Mon. 2 : P2₁
9.FA.45	Kumdykolite	Na(AlSi₃O₈)	Orth. mmm(2/m2/m2/m) : Pnnm
9.FA.50	Slawsonite	Sr(Al₂Si₂O₈)	Mon. 2/m : P2₁/b
9.FA.55	Lisetite	CaNa₂Al₄Si₄O₁₆	Orth. mm2
9.FA.60	Stronalsite	Na₂SrAl₄Si₄O₁₆	Orth.
9.FA.60	Banalsite	Na₂BaAl₄Si₄O₁₆	Orth. mm2 : Iba2
9.FA.65	Maleevite	BaB₂Si₂O₈	Orth. mmm(2/m2/m2/m) : Pnma
9.FA.65	Pekovite	SrB₂Si₂O₈	Orth. mmm(2/m2/m2/m) : Pnma
9.FA.65	Danburite	CaB₂Si₂O₈	Orth. mmm(2/m2/m2/m)
9.FA.70	Liebermannite	KAlSi₃O₈	Tet. 4/m : I4/m
9.FA.70	Lingunite	NaAlSi₃O₈	Tet. 4/m : I4/m
9.FA.70	Stöfflerite	CaAl₂Si₂O₈	Tet. 4/m : I4/m
9.FA.75	Pfaffenbergite	KNa₃(Al₄Si₁₂)O₃₂	Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.FA.75	Kokchetavite	K(AlSi₃O₈)	Hex. 6/mmm(6/m2/m2/m) : P6/mcc

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 YoshiokaiteHide

mindat.org URL:

https://www.mindat.org/min-4366.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 YoshiokaiteHide

Reference List:

Vaniman, David T., Bish, David L. (1990) Yoshiokaite, a new Ca,Al-silicate mineral from the Moon. American Mineralogist, 75 (5-6) 676-686

Steele, Ian M., Pluth, J. J. (1990) Crystal structure of synthetic yoshiokaite, a stuffed derivative of the tridymite structure. American Mineralogist, 75 (9-10) 1186-1191

Vaniman, David T., Bish, David L. (1990) Yoshiokaite, a new Ca,Al-silicate mineral from the Moon. American Mineralogist, 75 (5-6) 676-686

(2001) Yoshiokaite. Handbook of Mineralogy. Mineralogical Society of America

Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/

Localities for YoshiokaiteHide

Showing 1 localities.

ⓘ - 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.

The Moon (TL)

Fra Mauro Highlands

ⓘ Fra Mauro Base (Apollo 14 landing site) (TL)

Vaniman et al. (1990)

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Yoshiokaite

Unique IdentifiersHide

IMA Classification of YoshiokaiteHide

Classification of YoshiokaiteHide

Mineral SymbolsHide

Physical Properties of YoshiokaiteHide

Optical Data of YoshiokaiteHide

Chemistry of YoshiokaiteHide

Crystallography of YoshiokaiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of YoshiokaiteHide

Synonyms of YoshiokaiteHide

Other Language Names for YoshiokaiteHide

Relationship of Yoshiokaite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for YoshiokaiteHide

References for YoshiokaiteHide

Localities for YoshiokaiteHide

Related Minerals - Strunz-mindat Grouping Hide