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Yoshiokaite

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Formula:
(Ca,Na)[Al(Al,Si)O4]
System:
Trigonal
Colour:
Colourless (white?)
Name:
Named after Takashi Yoshioka (1935-1983), mineralogist, Nihon Cement Company (Japan).
Nepheline Group.

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.


Classification of Yoshiokaite

Approved
Approval Year:
1989
9.FA.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.2.1.6

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
16.9.3

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

Type Occurrence of Yoshiokaite

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
Geological Setting of Type Material:
lunar regolith breccia (near Apollo 14 landing site)
Associated Minerals at Type Locality:

Physical Properties of Yoshiokaite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless (white?)
Comment:
Semitransparent
Cleavage:
Poor/Indistinct
{101}

Crystallography of Yoshiokaite

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
P3
Cell Parameters:
a = 9.939Å, c = 8.245Å
Ratio:
a:c = 1 : 0.83
Unit Cell Volume:
V 705.35 ų (Calculated from Unit Cell)
Comment:
space group not sure
X-Ray Powder Diffraction Data:
d-spacingIntensity
8.57 (100)
2.979 (91)
3.718 (79)
2.871 (78)
1.158 (51)
2.062 (41)
4.123 (36)
(

Optical Data of Yoshiokaite

Type:
Uniaxial (+)
RI values:
nω = 1.560 - 1.580 nε = 1.620 - 1.640
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Yoshiokaite

Formula:
(Ca,Na)[Al(Al,Si)O4]
All elements listed in formula:
Analytical Data:
Electron microprobe, wt.%, one of 2 analyses
SiO2 28.0
TiO2 0.07
Al2O3 45.9
FeO 0.18
MgO 0.98
CaO 25.5
Na2O 0.00
K2O 0.00

total 100.7
Empirical Formula:
(Ca0.66Mg0.04)0.70(Al1.30Si0.67)1.97O4
Common Impurities:
Ti,Fe,Mg,Na,K

Relationship of Yoshiokaite to other Species

9.FA.05KaliophiliteKAlSiO4
9.FA.05KalsiliteKAlSiO4
9.FA.05Nepheline(Na,K)AlSiO4
9.FA.05Panunzite(K,Na)AlSiO4
9.FA.05Trikalsilite(K,Na)AlSiO4
9.FA.05MegakalsiliteKAlSiO4
9.FA.10MalinkoiteNaBSiO4
9.FA.15VirgiliteLiAlSi2O6
9.FA.25LisitsyniteKBSi2O6
9.FA.30AdulariaKAlSi3O8
9.FA.30Anorthoclase(Na,K)AlSi3O8
9.FA.30Buddingtonite(NH4)(AlSi3)O8
9.FA.30CelsianBa(Al2Si2O8)
9.FA.30Hyalophane(K,Ba)[Al(Si,Al)Si2O8]
9.FA.30MicroclineK(AlSi3O8)
9.FA.30OrthoclaseK(AlSi3O8)
9.FA.30SanidineK(AlSi3O8)
9.FA.30RubiclineRb(AlSi3O8)
9.FA.30MonalbiteNaAlSi3O8
9.FA.35AlbiteNa(AlSi3O8)
9.FA.35Andesine(Na,Ca)[Al(Si,Al)Si2O8]
9.FA.35AnorthiteCa(Al2Si2O8)
9.FA.35Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
9.FA.35Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
9.FA.35Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
9.FA.35ReedmergneriteNaBSi3O8
9.FA.40ParacelsianBa(Al2Si2O8)
9.FA.45SvyatoslaviteCa(Al2Si2O8)
9.FA.45KumdykoliteNa(AlSi3O8)
9.FA.50SlawsoniteSr(Al2Si2O8)
9.FA.55LisetiteCaNa2Al4Si4O16
9.FA.60BanalsiteNa2BaAl4Si4O16
9.FA.60StronalsiteNa2SrAl4Si4O16
9.FA.65DanburiteCaB2Si2O8
9.FA.65MaleeviteBaB2Si2O8
9.FA.65PekoviteSrB2Si2O8
9.FA.70Lingunite(Na,Ca)AlSi3O8
9.FA.75KokchetaviteK(AlSi3O8)
16.9.1GehleniteCa2Al(AlSiO7)
16.9.2AnorthiteCa(Al2Si2O8)
16.9.4SvyatoslaviteCa(Al2Si2O8)
16.9.5DmisteinbergiteCa(Al2Si2O8)
16.9.6GrossularCa3Al2(SiO4)3
16.9.7VuagnatiteCaAl(SiO4)(OH)
16.9.8Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
16.9.9Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
16.9.10PrehniteCa2Al2Si3O10(OH)2
16.9.11KamaishiliteCa2(Al2SiO6)(OH)2
16.9.12BicchuliteCa2(Al2SiO6)(OH)2
16.9.13MargariteCaAl2(Al2Si2O10)(OH)2
16.9.14ChantaliteCaAl2(SiO4)(OH)4
16.9.15CebolliteCa5Al2(SiO4)3(OH)4
16.9.17KatoiteCa3Al2(SiO4)3-x(OH)4x
16.9.18LawsoniteCaAl2(Si2O7)(OH)2 · H2O
16.9.19ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
16.9.20WairakiteCa(Al2Si4O12) · 2H2O
16.9.21VertumniteCa4Al4Si4O6(OH)24 · 3H2O
16.9.22ScoleciteCaAl2Si3O10 · 3H2O
16.9.23LaumontiteCaAl2Si4O12 · 4H2O
16.9.24YugawaraliteCaAl2Si6O16 · 4H2O
16.9.25Gismondine-CaCaAl2Si2O8 · 4H2O
16.9.26EpistilbiteCaAl2Si6O16 · 5H2O
16.9.27GoosecreekiteCa[Al2Si6O16] · 5H2O
16.9.28CowlesiteCaAl2Si3O10 · 6H2O
16.9.30StelleriteCa4(Si28Al8)O72 · 28H2O
16.9.31SträtlingiteCa2Al2SiO7 · 8H2O
16.9.32AmstalliteCaAl(Si,Al)4O8(OH)4 · (H2O,Cl)

Other Names for Yoshiokaite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Yoshiokaite

Reference List:
- Vaniman D.T. and Bish D.L. (1990). Yoshiokaite, a new Ca, Al-silicate mineral from the Moon. American Mineralogist, 75, p. 676-686.

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

Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for Yoshiokaite

mindat.org URL:
http://www.mindat.org/min-4366.html
Please feel free to link to this page.

Localities for Yoshiokaite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
The Moon (TL)
 
  • Fra Mauro Highlands
Amer.Min.(1990) 75, 676-686
Mineral and/or Locality  
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