| |
 |
Spodiophyllite Mineral Data
|
|
|
General Spodiophyllite Information
|
 Chemical Formula: |
(Na,K)4(Mg,Fe++)3(Fe+++,Al)2(Si8O24) |
| Composition: |
Molecular Weight = 910.57 gm |
| |
Potassium 4.29 % K 5.17 % K2O |
| |
Sodium 7.57 % Na 10.21 % Na2O |
| |
Magnesium 6.01 % Mg 9.96 % MgO |
| |
Aluminum 1.48 % Al 2.80 % Al2O3 |
| |
Iron 13.80 % Fe 5.92 % FeO / 13.15 % Fe2O3 |
| |
Silicon 24.68 % Si 52.79 % SiO2 |
| |
Oxygen 42.17 % O |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na3KMg2.25Fe2+0.75Fe3+1.5Al0.5Si8O24 |
| Environment: |
Related to tainiolite? |
| IMA Status: |
Discredited IMA 1998 (Mica Nomenclature Subcommittee) - Valid Species (PreIMA) 1900 |
| Locality: |
Narsarsuk, Julianehaab distr., southern Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Greek for SPODIOS (color ash) and PYLLON (leaf) habit. |
| |
Spodiophyllite Image |
|
Images:
|
|
Spodiophyllite
Comments: Gray to black prismatic spodiophyllite crystals in matrix.
Location: Mt. Kukisvumtchorr, Chibiny, Kola, Russia.
Scale: Specimen Size 4x4 cm.
© Diederik Visser |
|
Spodiophyllite Crystallography
|
| Crystal System: |
Monoclinic |
| |
Physical Properties of Spodiophyllite
|
| Cleavage: |
{001} Perfect |
| Color: |
Ash gray. |
| Density: |
2.6 |
| Diaphaneity: |
Translucent to subtranslucent |
| Habit: |
Micaceous - Platy texture with "flexible" plates. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
3-3.5 - Calcite-Copper Penny |
| Luster: |
Pearly |
| Streak: |
white |
| |
Optical Properties of Spodiophyllite
|
| Optical Data: |
NCalc= 1.57 - from Gladstone-Dale relationship (KC = 0.2176) where Ncalc=Dmeas*KC+1 |
| |
Calculated Properties of Spodiophyllite
|
| Electron Density: |
Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Spodiophyllite =2.60 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PESpodiophyllite = 5.76 barns/electron
U=PESpodiophyllite x relectron= 14.74 barns/cc.
|
| Radioactivity: |
GRapi = 60.96 (Gamma Ray American Petroleum Institute Units)
Concentration of Spodiophyllite per GRapi unit = 1.64 (%)
Estimated Radioactivity from Spodiophyllite  - barely detectable
|
| |
Spodiophyllite Classification
|
| Dana Class: |
71.00.00.00 (71)Phyllosilicate Minerals |
| |
(71.00)Without Dana Classification Numbers |
| |
(71.00.00)Brittle Mica Group |
| |
71.00.00.00 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono |
| |
71.00.00.00 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho |
| |
71.00.00.00 Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono |
| |
71.00.00.00 Orlovite KLi2TiSi4O11F C 2 2 |
| |
71.00.00.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 21/c 2/m |
| |
71.00.00.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono |
| |
71.00.00.00 Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m |
| Strunz Class: |
09.BX.00 09 - SILICATES (Germanates) |
| |
09.B - Unclassified Strunz Phyllosilicates |
| |
09.BX -Brittle Mica Group |
| |
09.BX.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono |
| |
09.BX.00 Pimelite? Ni3Si4O10(OH)2•4(H2O) Unk. Hex |
| |
09.BX.00 Zinalsite Zn2AlSi2O5(OH)4•2(H2O)(?) Mono |
| |
09.BX.00 Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m |
| |
09.BX.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 21/c 2/m |
| |
09.BX.00 Orlovite KLi2TiSi4O11F C 2 2 |
| |
09.BX.00 IMA2009-011 Ba3Na(Fe,Mn)8Ti4(Si2O7)4O4(OH,F)7 C1 1 |
| |
Other Spodiophyllite Information
|
| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,1st ed.,1974) |
| See Also: |
Links to other databases for Spodiophyllite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
Search for Spodiophyllite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Spodiophyllite :
Ask about Spodiophyllite 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 Spodiophyllite Specimen Label here :
|
Spodiophyllite
(Na,K)4(Mg,Fe++)3(Fe+++,Al)2(Si8O24)
Dana No: 71.00.00.00 Strunz No: 09.BX.00
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.