Pectolite Mineral Data (original) (raw)

General Pectolite Information

Help on Chemical Formula: Chemical Formula:

NaCa2Si3O8(OH)

Help on Composition: Composition:

Molecular Weight = 332.40 gm

Sodium 6.92 % Na 9.32 % Na2O

Calcium 24.11 % Ca 33.74 % CaO

Silicon 25.35 % Si 54.23 % SiO2

Hydrogen 0.30 % H 2.71 % H2O

Oxygen 43.32 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

NaCa2(Si3O8)(OH)

Help on Environment: Environment:

Secondary mineral in basaltic rocks.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1828

Help on Locality: Locality:

Prospect Park quarry, northern New Jersey. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

From the Greek pektos - "compacted" and lithos - "stone."

Help on Name Pronunciation: Name Pronunciation:

Pectolite + Pronunciation Say PECTOLITE

Help on Synonym: Synonym:

ICSD 34945

Larimar - blue

PDF 33-1223

Pectolite Image

Click Here for Larger Pectolite Image in a New Browser Window Images:

Click Here for Larger Pectolite Image in a New Browser Window Images:

Click Here for Larger Pectolite Image Pectolite Sugilite Comments: Sharp terminated purple crystals of sugilite to 5mm on white, acicular pectolite. Location: Wessels Mine, Kalahari, South Africa.Scale: Picture size 1.5 cm. © John Veevaert

Pectolite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.1349:1:0.9971

Help on Cell Dimensions: Cell Dimensions:

a = 7.99, b = 7.04, c = 7.02, Z = 2; alpha = 90.05°, beta = 95°, gamma = 102.467° V = 384.09 Den(Calc)= 2.87

Help on Crystal System: Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.901(1), 3.082(0.4), 3.061(0.2),

Click Here for Large Pectolite Structure Window Crystal Structure:

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| | Ohashi Y , Finger L W , American Mineralogist , 63 (1978) p.274-288, The role of octahedral cations in pyroxenoid crystal chemistry. I. Bustamite,, wollastonite, and the pectolite-schizolite-serandite series, sample SCH, from Kangerdluarsuk, Julianehaab, Greenland View Additional jPOWD Structure files for Pectolite [1] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Pectolite

Help on Cleavage: Cleavage:

{001} Perfect, {100} Perfect

Help on Color: Color:

White, Gray, Light pink, Light green.

Help on Density: Density:

2.86

Help on Diaphaneity: Diaphaneity:

Subtranslucent to translucent to opaque

Help on Fracture: Fracture:

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

Help on Habit: Habit:

Acicular - Occurs as needle-like crystals.

Help on Habit: Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Help on Habit: Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Help on Hardness: Hardness:

5 - Apatite

Help on Luminescence: Luminescence:

Fluorescent and Triboluminescent, Short UV=pink, Long UV=orange-pink.

Help on Luster: Luster:

Vitreous - Silky

Help on Streak: Streak:

white

Optical Properties of Pectolite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2145,KPDmeas= 0.2153,KC= 0.2106
Ncalc = 1.6

Help on Optical Data: Optical Data:

Biaxial (+), a=1.594-1.61, b=1.603-1.614, g=1.631-1.642, bire=0.0320-0.0370, 2V(Calc)=42-60, 2V(Meas)=50-63. Dispersion very weak, r > v.

Help on Pleochroism (x): Pleochroism (x):

colorless.

Help on Pleochroism (y): Pleochroism (y):

colorless.

Help on Pleochroism (z): Pleochroism (z):

colorless.

Calculated Properties of Pectolite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Pectolite =2.87 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEPectolite = 4.04 barns/electron
U=PEPectolite x rElectron Density= 11.58 barns/cc.

Help on Radioactivity: Radioactivity:

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

Pectolite Classification

Help on Dana Class: Dana Class:

65.02.01.04 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.02)with chains P=3

(65.02.01)Wollastonite group

65.02.01.01a Wollastonite-1A CaSiO3 P1 1

65.02.01.01b Wollastonite-2M* CaSiO3 P 21 2

65.02.01.01c Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

65.02.01.02 Bustamite (Mn,Ca)3Si3O9 P1 1

65.02.01.03 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

65.02.01.04 Pectolite NaCa2Si3O8(OH) P1 1

65.02.01.05 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

65.02.01.06 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1

65.02.01.07 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

65.02.01.08 Tanohataite! LiMn2Si3O8(OH) P1 1

Help on Strunz Class: Strunz Class:

09.DG.05 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.05 Bustamite (Mn,Ca)3Si3O9 P1 1

09.DG.05 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

09.DG.05 Pectolite NaCa2Si3O8(OH) P1 1

09.DG.05 Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

09.DG.05 Wollastonite-1A CaSiO3 P1 1

09.DG.05 Wollastonite-2M* CaSiO3 P 21 2

09.DG.05 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

Other Pectolite Information

Help on References: References:

NAME( Sinkankas66) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(Heinrich65)

Help on See Also: See Also:

Links to other databases for Pectolite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Glendale Community College
12 - Google Images
13 - Google Scholar
14 - Handbook of Mineralogy (MinSocAm)
15 - Handbook of Mineralogy (UofA)
16 - MinDAT
17 - Mineral and Gemstone Kingdom
18 - Mineralienatlas (Deutsch)
19 - Online Mineral Museum
20 - QUT Mineral Atlas
21 - Ruff.Info
22 - Tradeshop.com - The Rainbow of Gems
23 - WWW-MINCRYST

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

Pectolite

NaCa2Si3O8(OH)
Dana No: 65.02.01.04 Strunz No: 09.DG.05
Locality:

Notes: