Megacyclite Mineral Data

Megacyclite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


B and L Minerals
[New Items] [Specials] [Login] [Register] [Auction Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels


General Megacyclite Information

Help on Chemical Formula: Chemical Formula: Na8KSi9O18(OH)9•19(H2O)
Help on Composition: Composition: Molecular Weight = 1,250.12 gm
   Potassium   3.13 %  K     3.77 % K2O
   Sodium     14.71 %  Na   19.83 % Na2O
   Silicon    20.22 %  Si   43.26 % SiO2
   Hydrogen    3.71 %  H    33.14 % H2O
   Oxygen     58.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na8KSi9O18(OH)9•18.5(H2O)
Help on Environment: Environment: In unweathered ultra-alkalic pegmatites in an alkalic massif. Turns white on exposure to air.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: On Mt. Rasvumchorr, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for large and cyclical, with reference to the large ringlike groups of silica tetrahedra in the structure.
Help on Name Pronunciation: Name Pronunciation: Megacyclite + Pronunciation Say MEGACYCLITE
Help on Synonym: Synonym: IMA1991-015
 

Search for Megacyclite Images

Click Here To Search 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.
  

Megacyclite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.0862:1:1.2495
Help on Cell Dimensions: Cell Dimensions: a = 24.91, b = 11.94, c = 14.92, Z = 4; beta = 94.47° V = 4,424.09 Den(Calc)= 1.88
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.08(1), 2.938(0.7), 2.64(0.6),4.26(0.6), 2.289(0.35), 2.4(0.35), 7.42(0.2),
Click Here for Large Megacyclite Structure Window 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


Zubkova N V , Pekov I V , Chukanov N V , Listsin D V , Rabadanov M K , Pushcharovsky D Y , New Data on Minerals. Moscow , 42 (2007) p.81-92, New data on megacyclite

 

Physical Properties of Megacyclite

Help on Cleavage: Cleavage: {100} Perfect, {001} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.82
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Regular - Flat surfaces (not cleavage) fractured in a regular pattern.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Megacyclite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.049 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2516,KPDmeas= 0.2599,KC= 0.2477
Ncalc = 1.45 - 1.47
Help on Optical Data: Optical Data: Biaxial (-), a=1.46, b=1.478, g=1.481, bire=0.0210, 2V(Calc)=44, 2V(Meas)=44. Dispersion r > v strong.
 

Calculated Properties of Megacyclite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.93 gm/cc
note: Specific Gravity of Megacyclite =1.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0097313629
Boson Index = 0.9902686371
Help on Photoelectric: Photoelectric: PEMegacyclite = 1.40 barns/electron
U=PEMegacyclite x relectron= 2.70 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Megacyclite per GRapi unit = 2.15 (%)

Estimated Radioactivity from Megacyclite - barely detectable

 

Megacyclite Classification
Help on Dana Class: Dana Class: 62.01.02.01 (62)Cyclosilicate Eight-Membered Rings
  (62.01)with 8-memebered and larger rings
  (62.01.02)Dana Group
 
62.01.02.01 Megacyclite Na8KSi9O18(OH)9•19(H2O) P 21/c 2/m
Help on Strunz Class: Strunz Class: 09.CP.10 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CP -12-membered and larger rings
 
09.CP.10 Megacyclite Na8KSi9O18(OH)9•19(H2O) P 21/c 2/m
 

Other Megacyclite Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Megacyclite :
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
15 - WWW-MINCRYST

Search for Megacyclite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Megacyclite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Megacyclite Mineral Data :

Ask about Megacyclite 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 Espaņol

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

Megacyclite

Na8KSi9O18(OH)9•19(H2O)
Dana No: 62.01.02.01 Strunz No: 09.CP.10
Locality:

 

Notes: