Serandite Mineral Data

Serandite Mineral Data +

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Serandite Information

Chemical Formula:

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

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

Empirical Formula:

NaMn²⁺_1.5Ca_0.5Si₃O₈(OH)

Environment:

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

IMA Status:

Valid Species (Pre-IMA) 1931

Locality:

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

Name Origin:

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

Synonym:

ICSD 12130

PDF 25-723

Serandite Image

Images:

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

Images:

Serandite Lintisite

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

Axial Ratios:

a:b:c =1.1071:1:0.9779

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

Crystal System:

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

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

By Intensity(I/I_o): 2.983(1), 3.158(0.9), 2.838(0.65),

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: [ 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.

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

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

Cleavage:

[100] Perfect, [001] Perfect

Color:

Light brown, Light pink, Orange red.

Density:

3 - 3.4, Average = 3.2

Diaphaniety:

Transparent to Translucent

Habit:

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

Hardness:

4.5-5.5 - Near Apatite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Serandite

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

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

Electron Density:

r_electron=3.34 gm/cc
note: r_Serandite=3.41 gm/cc.

Fermion Index

Fermion Index = 0.01136
Boson Index = 0.98864

Photoelectric:

PE_Serandite= 7.60 barns/electron
U=PE_Serandite x r_electron= 25.36 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Serandite is Not Radioactive

Serandite Classification

Dana Class:

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

(65.2)with chains P=3

(65.2.1)Wollastonite group

65.2.1.1a Wollastonite-1A CaSiO3 P1 1

65.2.1.1b Wollastonite-2M* CaSiO3 P 2₁ 2

65.2.1.1c Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

65.2.1.2 Bustamite (Mn,Ca)3Si3O9 P1 1

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

65.2.1.4 Pectolite NaCa2Si3O8(OH) P1 1

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

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

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

Strunz Class:

VIII/F.18-80 VIII - Silicates

VIII/F - Inosilicates (chain and band) Triplet chains [Si3O9]6-

VIII/F.18 - Wollastonite-2M - Foshagite series

VIII/F.18-10 Wollastonite-1A CaSiO3 P1 1

VIII/F.18-10* Wollastonite-2M* CaSiO3 P 2₁ 2

VIII/F.18-10** Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

VIII/F.18-30 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

VIII/F.18-40 Bustamite (Mn,Ca)3Si3O9 P1 1

VIII/F.18-50 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1

VIII/F.18-60 Pectolite NaCa2Si3O8(OH) P1 1

VIII/F.18-70 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

VIII/F.18-80 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

VIII/F.18-90 Foshagite Ca4Si3O9(OH)2 P 2₁/m 2/m

VIII/F.18-100 Hillebrandite Ca6Si3O9(OH)6 C mc2₁ mm2

Other Serandite Information

References:

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

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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineral and Gemstone Kingdom
16 - Mineralienatlas (Deutsch)
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

Search for Serandite using:

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

Visit our Advertisers for Serandite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Serandite Mineral Data :

Ask about Serandite 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 Serandite Specimen Label here :

Serandite

Na(Mn++,Ca)2Si3O8(OH)
Dana No: 65.2.1.5 Strunz No: VIII/F.18-80
Locality:

Notes: