Serandite Mineral Data (original) (raw)

General Serandite Information

Help on Chemical Formula: Chemical Formula:

Na(Mn++,Ca)2Si3O8(OH)

Help on Composition: Composition:

Molecular Weight = 354.69 gm

Sodium 6.48 % Na 8.74 % Na2O

Calcium 5.65 % Ca 7.91 % CaO

Manganese 23.23 % Mn 30.00 % MnO

Silicon 23.75 % Si 50.82 % SiO2

Hydrogen 0.28 % H 2.54 % H2O

Oxygen 40.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

NaMn2+1.5Ca0.5Si3O8(OH)

Help on Environment: Environment:

Alkaline rocks and syenite pegmatites. Forms a series with pectolite.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1931

Help on Locality: Locality:

Rouma, Los Islands, Guinea. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for J. M. Serand, West African mineral collector.

Help on Name Pronunciation: Name Pronunciation:

Serandite + Pronunciation Say SERANDITE

Help on Synonym: Synonym:

ICSD 12130

PDF 25-723

Serandite Image

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

Click Here for Larger Serandite Image Serandite Analcime Natrolite Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime. Location: Mt. St. Hilaire, Canada.Scale: 4 x 3 cm. © Fabre Minerals

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

Serandite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.1071:1:0.9779

Help on Cell Dimensions: Cell Dimensions:

a = 7.638, b = 6.899, c = 6.747, Z = 2; alpha = 90.53°, beta = 94.12°, gamma = 102.75° V = 345.85 Den(Calc)= 3.41

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): 2.983(1), 3.158(0.9), 2.838(0.65),

Help on Forms: Forms:

Mouse
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| | Forms:( 0 1 0) ( 1 1 0) ( 1 0 1) ( 1 0 0) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Serandite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
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| | Takeuchi Y , Kudoh Y , Yamanaka T , American Mineralogist , 61 (1976) p.229-237, Crystal chemistry of the serandite-pectolite series and related minerals View Additional jPOWD Structure files for Serandite [1] [2] [3] [4] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Serandite

Help on Cleavage: Cleavage:

{100} Perfect, {001} Perfect

Help on Color: Color:

Light brown, Light pink, Orange red.

Help on Density: Density:

3 - 3.4, Average = 3.2

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Habit: Habit:

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

Help on Hardness: Hardness:

4.5-5.5 - Near Apatite

Help on Luster: Luster:

Vitreous - Pearly

Help on Streak: Streak:

white

Optical Properties of Serandite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2018,KPDmeas= 0.215,KC= 0.2066
Ncalc = 1.62 - 1.7

Help on Optical Data: Optical Data:

Biaxial (+), a=1.674-1.68, b=1.677-1.682, g=1.705-1.71, bire=0.0250-0.0360, 2V(Calc)=34-36, 2V(Meas)=33.

Calculated Properties of Serandite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Serandite =3.41 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PESerandite = 7.60 barns/electron
U=PESerandite x rElectron Density= 25.36 barns/cc.

Help on Radioactivity: Radioactivity:

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

Serandite Classification

Help on Dana Class: Dana Class:

65.02.01.05 (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 Serandite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8, Enc. of Minerals, 2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Serandite :
1 - Alkali-Nuts(Francais)
2 - Am. Min. Crystal Structure Database
3 - Amethyst Galleries' Mineral Gallery
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineral and Gemstone Kingdom
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

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

Serandite

Na(Mn++,Ca)2Si3O8(OH)
Dana No: 65.02.01.05 Strunz No: 09.DG.05
Locality:

Notes: