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Serandite Mineral Data

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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

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  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

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  Lintisite   Serandite

Comments: Yellowish-white fibrous veinlets of lintisite in brown serandite.
Location: Mount Alluaiv, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - Pinacoidal H-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:

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Help on Above

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

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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:

 

 
   
 


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