Yoshiokaite Mineral Data

Yoshiokaite Mineral Data +

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

IMA Status:

Approved IMA 1990

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 69380

IMA1989-043

PDF 46-1336

Search for Yoshiokaite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Yoshiokaite

Electron Density:

r_electron=2.89 gm/cc
note: r_Yoshiokaite=2.93 gm/cc.

Fermion Index

Fermion Index = 0.00157
Boson Index = 0.99843

Photoelectric:

PE_Yoshiokaite= 4.02 barns/electron
U=PE_Yoshiokaite x r_electron= 11.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Yoshiokaite is Not Radioactive

Yoshiokaite Classification

Dana Class:

76.2.1.6 (76)Tectosilicate Al-Si Framework

(76.2)Feldspathoids and related species

(76.2.1)Nepheline group

76.2.1.1 Kalsilite KAlSiO4 P 3₁c 3m

76.2.1.2 Nepheline (Na,K)AlSiO4 P 6₃ 6

76.2.1.3 Trikalsilite (K,Na)AlSiO4 P 6₃ 6

76.2.1.4 Panunzite (K,Na)AlSiO4 P 6₃ 6

76.2.1.5 Kaliophilite KAlSiO4 P 6₃22 6 2 2

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

76.2.1.7 Megakalsilite! KAlSiO4 P 6₃ 6

Strunz Class:

VIII/J.02-60 VIII - Silicates

VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders

VIII/J.02 - Nepheline - Yoshiokaite series

VIII/J.02-10 Nepheline (Na,K)AlSiO4 P 6₃ 6

VIII/J.02-20 Kalsilite KAlSiO4 P 3₁c 3m

VIII/J.02-25 Megakalsilite! KAlSiO4 P 6₃ 6

VIII/J.02-30 Trikalsilite (K,Na)AlSiO4 P 6₃ 6

VIII/J.02-40 Panunzite (K,Na)AlSiO4 P 6₃ 6

VIII/J.02-50 Kaliophilite KAlSiO4 P 6₃22 6 2 2

VIII/J.02-60 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3

VIII/J.02-70 Malinkoite! NaBSiO4 P 6₃ 6

Other Yoshiokaite Information

References:

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

Search for Yoshiokaite using:

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

Visit our Advertisers for Yoshiokaite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
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: 76.2.1.6 Strunz No: VIII/J.02-60
Locality:

Notes: