Scapolite Mineral Data

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

General Scapolite Information

Chemical Formula:

(Na,Ca)4[Al3Si9O24]Cl

Composition:

Molecular Weight = 877.08 gm

Sodium 5.24 % Na 7.07 % Na₂O

Calcium 9.14 % Ca 12.79 % CaO

Aluminum 15.38 % Al 29.06 % Al₂O₃

Silicon 22.42 % Si 47.95 % SiO₂

Chlorine 4.04 % Cl 4.04 % Cl

- % Cl -0.91 % -O=Cl₂

Oxygen 43.78 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Ca₂Al₅Si₇O₂₄Cl

IMA Status:

Not Approved IMA

Locality:

Otter Lake, Canada. Link to MinDat.org Location Data.

Name Origin:

Named in 1800 rom the Greek skapos - "rod" and lithos - "stone."

Name Pronunciation:

Scapolite + Pronunciation

Synonym:

Wernerite

Scapolite Image

Images:

Scapolite

Comments: Violet colored, gemmy crystal of Scapolite, with upper terminations.
Location: Dodoma, Tanzania. Scale: 1 x 0.5 cm.
© Fabre Minerals

Scapolite Crystallography

Axial Ratios:

a:c = 1:0.62904

Cell Dimensions:

a = 12.05, c = 7.58, Z = 2; V = 1,100.64 Den(Calc)= 2.65

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 4₁/n

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

By Intensity(I/I_o): 3.46(1), 3.07(0.7), 3.03(0.6),3.82(0.6), 1.912(0.3), 2.69(0.3), 2.7(0.3), 6.04(0.2),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 1 0 0) ( 3 1 1) ( 1 1 1) ( 1 1 0)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

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

Levien L , Papike J J , American Mineralogist , 61 (1976) p.864-877, Scapolite crystal chemistry: Aluminum-silicon distributions, carbonate group, disorder, and thermal expansion, before heating

View Additional jPOWD Structure files for Scapolite
[1] [2] [3] [4] [5] [6] [7] [8]

Physical Properties of Scapolite

Cleavage:

{100} Distinct, {110} Distinct

Color:

White, Gray, Pale brown, Pink, Yellow.

Density:

2.56 - 2.77, Average = 2.66

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Scapolite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KPDmeas= 0.2096,KC= 0.213
Ncalc = 1.55 - 1.59

Optical Data:

Uniaxial (-), e=1.522-1.571, w=1.534-1.607, bire=0.0120-0.0360.

Calculated Properties of Scapolite

Electron Density:

Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Scapolite =2.65 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Scapolite= 2.78 barns/electron
U=PE_Scapolite x rElectron Density= 7.30 barns/cc.

Radioactivity:

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

Scapolite Classification

Dana Class:

76.03.01.00 (76)Tectosilicate Al-Si Framework

(76.03)with other Be/Al/Si frameworks

(76.03.01)Scapolite group

76.03.01.00 Scapolite* (Na,Ca)4[Al3Si9O24]Cl P 4₁/n 4/m

76.03.01.01 Marialite Na4Al3Si9O24Cl I 4/m 4/m

76.03.01.02 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m

76.03.01.03 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m

Strunz Class:

09.FB.15 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FB -Tektosilicates with additional anions

09.FB.15 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m

09.FB.15 Marialite Na4Al3Si9O24Cl I 4/m 4/m

09.FB.15 Scapolite* (Na,Ca)4[(Al,Si)12O24]Cl P 4₁/n 4/m

09.FB.15 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m

Other Scapolite Information

References:

NAME( Mason68) PHYS. PROP.(Mason68) OPTIC PROP.(Heinrich65)

See Also:

Links to other databases for Scapolite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - Franklin Minerals(Palache)
6 - Google Images
7 - Google Scholar
8 - HyperPhysics
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - Tradeshop.com - The Rainbow of Gems
17 - UCLA - Petrography Thin-Sections
18 - WWW-MINCRYST

Search for Scapolite using:

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

Visit our Advertisers for Scapolite :

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 Scapolite Mineral Data :

Ask about Scapolite 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 Scapolite Specimen Label here :

Scapolite

(Na,Ca)4[Al3Si9O24]Cl
Dana No: 76.03.01.00 Strunz No: 09.FB.15
Locality:

Notes: