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Yoshiokaite Mineral Data

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General Yoshiokaite Information

Help on Chemical  Formula: Chemical Formula: (Ca8-(x/2)[ ](x/2)Al16-xSixO32)
Help on Composition: Composition: Molecular Weight = 1,245.37 gm
   Calcium   24.14 %  Ca   33.77 % CaO
   Aluminum  32.50 %  Al   61.40 % Al2O3
   Silicon    2.26 %  Si    4.82 % SiO2
   Oxygen    41.11 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca7.5Al15SiO32
Help on Environment: Environment: A metastable phase, as shocked crystal fragments and in devitrified glasses in a regolith breccia. The glass may have resulted from shock melting of alkali anorthite on the ancient lunar highlands.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: On the Moon, near the Apollo 14 landing site. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for T. Yoshioka (1935-1983), who studied the synthetic phase.
Help on Name Pronunciation: Name Pronunciation: Yoshiokaite + Pronunciation Say YOSHIOKAITE
Help on Synonym: Synonym: ICSD 69380
  PDF 46-1336

Yoshiokaite Image

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Comments: B&W image of the largest yoshiokaite crystal yet found (grain #23); note fracturing probably caused by shock deformation and the groundmass of regolith glass. (AmMin v75:676).
Location: At a distance of about 224 m from their Apollo 14 lunar lander, in the bottom of a 30-cm-deep trench, Mitchell and Shepard collected the two-gram rock that is regolith breccia 14076. Scale: Scale Bar 50 µm.
© American Mineralogist

Yoshiokaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.82956
Help on Cell Dimensions: Cell Dimensions: a = 9.939, c = 8.245, Z = 1; V = 705.35 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.57(1), 2.979(0.91), 3.718(0.79),

Physical Properties of Yoshiokaite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: White, Colorless.
Help on Density: Density: 2.76 - 2.9, Average = 2.83
Help on Diaphaneity: Diaphaneity: Translucent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Yoshiokaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2048,KPDmeas= 0.212,KC= 0.2081
Ncalc = 1.57 - 1.61
Help on Optical Data: Optical Data: Uniaxial (+), w=1.56-1.58, e=1.62-1.64, bire=0.0600.

Calculated Properties of Yoshiokaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Yoshiokaite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015763399
Boson Index = 0.9984236601
Help on Photoelectric: Photoelectric: PEYoshiokaite = 4.02 barns/electron
U=PEYoshiokaite x rElectron Density= 11.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yoshiokaite is Not Radioactive

Yoshiokaite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.01)Nepheline group Kalsilite KAlSiO4 P 31c 3m Nepheline (Na,K)AlSiO4 P 63 6 Trikalsilite (K,Na)AlSiO4 P 63 6 Panunzite (K,Na)AlSiO4 P 63 6 Kaliophilite KAlSiO4 P 6322 6 2 2 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3 Megakalsilite! KAlSiO4 P 63 6
Help on  Strunz Class: Strunz Class: 09.FA.05 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
09.FA.05 Nepheline (Na,K)AlSiO4 P 63 6
09.FA.05 Kaliophilite KAlSiO4 P 6322 6 2 2
09.FA.05 Kalsilite KAlSiO4 P 31c 3m
09.FA.05 Panunzite (K,Na)AlSiO4 P 63 6
09.FA.05 Trikalsilite (K,Na)AlSiO4 P 63 6
09.FA.05 Megakalsilite! KAlSiO4 P 63 6
09.FA.05 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3

Other Yoshiokaite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.75,p676-686,1990) OPTIC PROP.(Am.Min.,Vol.75,p676-686,1990)
Help on See Also: See Also: Links to other databases for Yoshiokaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Yoshiokaite Specimen Label here :


(Ca8-(x/2)[ ](x/2)Al16-xSixO32)
Dana No: Strunz No: 09.FA.05





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