Yoshiokaite Mineral Data

[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions]
Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows

General Yoshiokaite Information

Chemical Formula:

(Ca8-(x/2)[ ](x/2)Al16-xSixO32)

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

Empirical Formula:

Ca_7.5Al₁₅SiO₃₂

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.

IMA Status:

Approved IMA 1990

Locality:

On the Moon, near the Apollo 14 landing site. Link to MinDat.org Location Data.

Name Origin:

Named for T. Yoshioka (1935-1983), who studied the synthetic phase.

Name Pronunciation:

Yoshiokaite + Pronunciation

Synonym:

ICSD 69380

IMA1989-043

PDF 46-1336

Yoshiokaite Image

Images:

Yoshiokaite

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

Axial Ratios:

a:c = 1:0.82956

Cell Dimensions:

a = 9.939, c = 8.245, Z = 1; V = 705.35 Den(Calc)= 2.93

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 8.57(1), 2.979(0.91), 3.718(0.79),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Physical Properties of Yoshiokaite

Cleavage:

{???} Indistinct

Color:

White, Colorless.

Density:

2.76 - 2.9, Average = 2.83

Diaphaneity:

Translucent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Yoshiokaite

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

Optical Data:

Uniaxial (+), w=1.56-1.58, e=1.62-1.64, bire=0.0600.

Calculated Properties of Yoshiokaite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Yoshiokaite =2.93 gm/cc.

Fermion Index:

Fermion Index = 0.0015763399
Boson Index = 0.9984236601

Photoelectric:

PE_Yoshiokaite= 4.02 barns/electron
U=PE_Yoshiokaite x rElectron Density= 11.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yoshiokaite is Not Radioactive

Yoshiokaite Classification

Dana Class:

76.02.01.06 (76)Tectosilicate Al-Si Framework

(76.02)Feldspathoids and related species

(76.02.01)Nepheline group

76.02.01.01 Kalsilite KAlSiO4 P 3₁c 3m

76.02.01.02 Nepheline (Na,K)AlSiO4 P 6₃ 6

76.02.01.03 Trikalsilite (K,Na)AlSiO4 P 6₃ 6

76.02.01.04 Panunzite (K,Na)AlSiO4 P 6₃ 6

76.02.01.05 Kaliophilite KAlSiO4 P 6₃22 6 2 2

76.02.01.06 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3

76.02.01.07 Megakalsilite! KAlSiO4 P 6₃ 6

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.75,p676-686,1990) OPTIC PROP.(Am.Min.,Vol.75,p676-686,1990)

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Yoshiokaite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Yoshiokaite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Yoshiokaite Mineral Data :

Ask about Yoshiokaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Yoshiokaite

(Ca8-(x/2)[ ](x/2)Al16-xSixO32)
Dana No: 76.02.01.06 Strunz No: 09.FA.05
Locality:

Notes: