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Sérandite

Big Photo

Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
© Rob Lavinsky

Show Sérandite Photos (85)
Formula:
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
System:TriclinicColour:Pale pink, salmon-red, ...
Hardness:5 - 5½
Name:Named after J.M. Sérand, mineral collector of west Africa, who assisted collecting the mineral.


Wollastonite Group. Pectolite-Schizolite-Sérandite Series. The managanese analogue of Pectolite.

Classification of Sérandite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/F.18-80
Nickel-Strunz 10th (pending) edition ID:9.DG.05

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
Dana 8th edition ID:65.2.1.5

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
Hey's CIM Ref.:14.18.27

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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Type Occurrence of Sérandite

Type Locality:Rouma Island (Roume; Roma; Ruma), Los Archipelago (Los Islands), Guinea
Place of Conservation of Type Material:Smithsonian, Washington DC 96515
Year of Discovery:1931

Occurrences of Sérandite

Geological Setting:In sodalite zenoliths and pegmatites, phonolite, contact metamorphic rocks.

Physical Properties of Sérandite

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Comment:Fibrous aggregates - dull to silky
Colour:Pale pink, salmon-red, salmon-orange, deep orange, rose-red, brown, colourless
Streak:White
Hardness (Mohs):5 - 5½
Tenacity:Brittle
Cleavage:Perfect
On {001} and {100}
Fracture:Irregular/Uneven
Density (measured):3.34 g/cm3
Density (calculated):3.42 g/cm3

Crystallography of Sérandite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.683(1) Å, b = 6.889(1) Å, c = 6.747(1) Å
α = 90.53(5)°, β = 94.12(2)°, γ = 102.75(2)°
Ratio:a:b:c = 1.115 : 1 : 0.979
Unit Cell Volume:V 347.29 ų (Calculated from Unit Cell)
Z:2
Morphology:Prismatic to acicular crystals
Twinning:Around [010] compostion plane {100}, less commonly contact twin on {110}

Optical Data of Sérandite

Type:Biaxial (+)
RI values: nα = 1.668 nβ = 1.671 nγ = 1.703
2V:Measured: 39° , Calculated: 39°
Maximum Birefringence:δ = 0.035

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r < v moderate

Chemical Properties of Sérandite

Formula:
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
Essential elements:H, Mn, Na, O, Si
All elements listed in formula:Ca, H, Mn, Na, O, Si
Common Impurities:Al,Fe,Mg,K,H2O

Relationship of Sérandite to other Species

Series:Forms a series with Pectolite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
9.DG.05Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
9.DG.05Cascandite
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]
9.DG.05Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DG.05Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
9.DG.05Wollastonite
Ca[SiO
 
3
]
9.DG.05Wollastonite-1A
CaSiO
 
3
9.DG.10Clinotobermorite
Ca
 
5
[Si
 
3
O
 
8
(OH)
 
2
]2.4H
 
2
O - Ca
 
5
[Si
 
6
O17]·5H
 
2
O
9.DG.10Plombièrite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·7H
 
2
O
9.DG.10Riversideite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·2H
 
2
O
9.DG.10Tobermorite
Ca
 
5
Si
 
6
(O,OH)
 
18
·5H
 
2
O
9.DG.15Foshagite
Ca
 
4
[(OH)
 
2
|Si
 
3
O
 
9
]
9.DG.20Jennite
Ca
 
9
H
 
2
Si
 
6
O
 
18
(OH)
 
8
·6H
 
2
O
9.DG.25Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
·nH
 
2
O
9.DG.25Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
·H
 
2
O
9.DG.30Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
9.DG.35Xonotlite
Ca
 
6
Si
 
6
O
 
17
(OH)
 
2
9.DG.40Hillebrandite
Ca
 
2
[(OH)
 
2
|SiO
 
3
]
9.DG.45Zorite
Na
 
2
Ti(Si,Al)
 
3
O
 
9
·nH
 
2
O
9.DG.45Chivruaiite
Ca
 
3
Ti
 
5
[(Si
 
6
O
 
17
)
 
2
|O(OH)
 
4
]·14H
 
2
O
9.DG.50Haineaultite
(Na,Ca)
 
5
Ca(Ti,Nb)
 
5
(OH,F)
 
4
|Si
 
6
O
 
17
]
 
2
 · 5H
 
2
O
9.DG.55Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.60Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.65Elpidite
Na
 
2
ZrSi
 
6
O
 
15
·3H
 
2
O
9.DG.70Fenaksite
(K,Na)
 
4
(Fe,Mn)
 
2
(Si
 
4
O
 
10
)
 
2
(OH,F)
9.DG.70Litidionite
CuNaKSi
 
4
O
 
10
9.DG.70Manaksite
KNaMnSi
 
4
O
 
10
9.DG.75Tinaksite
K
 
2
Na(Ca,Mn
2+
 
)
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.75Tokkoite
K
 
2
Ca
 
4
Si
 
7
O
 
17
(O,OH,F)
 
4
9.DG.75Senkevichite
CsKNaCa
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.80Canasite
Ca
 
5
Na
 
4
K
 
2
(Si
 
12
O
 
30
(OH,F)
 
4
9.DG.80Fluorcanasite
K
 
3
Na
 
3
Ca
 
5
Si
 
12
O
 
30
F
 
4
·H
 
2
O
9.DG.85Miserite
K(Ca,Ce)
 
4
Si
 
5
O
 
13
(OH)
 
3
9.DG.90Charoite
(K,Na)
 
5
(Ca,Ba,Sr)
 
8
(Si
 
6
O
 
15
)
 
2
(Si
 
6
O
 
16
)(OH,F)·H
 
2
O
9.DG.90Frankamenite
K
 
3
Na
 
3
Ca
 
5
(Si
 
12
O
 
30
)[F,(OH)]
 
4
·H
 
2
O
9.DG.95Yuksporite
(K,Ba)NaCa
 
2
(Si,Ti)
 
4
O
 
11
(F,OH)·H
 
2
O
9.DG.95Eveslogite
(Na,K,Ca,Sr,Ba)
 
48
 [(Ti,Nb,Mn,Fe
2+
 
)
 
12
Si
 
48
O
 
144
(OH)
 
12
](F,OH,Cl)
 
14
Related Minerals - Hey's Index Grouping:

- +
14.18.1Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
14.18.2Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
14.18.3Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
·6H
 
2
O
14.18.4Norrishite
KLiMn
2+
2
[(OH)
 
2
|Si
 
4
O
 
10
]
14.18.5Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
·6H
 
2
O
14.18.6Abswurmbachite
CuMn
3+
6
O
 
8
(SiO
 
4
)
14.18.7Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
14.18.8Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
14.18.9Caryopilite
(Mn,Mg)
 
3
Si
 
2
O
 
5
(OH)
 
4
14.18.10Gonyerite
(Mn,Mg)
 
5
Fe(Si
 
3
Fe)O
 
10
(OH)
 
8
14.18.11 Tirodite
14.18.12Manganhumite
(Mn
2+
 
,Mg)
 
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
14.18.13Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
14.18.14Glaucochroite
CaMn
2+
 
[SiO
 
4
]
14.18.15Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
·2H
 
2
O
14.18.16Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH)·H
 
2
O
14.18.17Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
14.18.18Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
14.18.19Neltnerite
CaMn
3+
6
[O
 
8
|SiO
 
4
]
14.18.20Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
·2H
 
2
O
14.18.21Inesite
Ca
 
2
(Mn,Fe)
 
7
Si
 
10
O
 
28
(OH)
 
2
·5H
 
2
O
14.18.22Orientite
Ca
 
2
MnMn
 
2
Si
 
3
O
 
10
(OH)
 
4
14.18.23Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
14.18.24Bostwickite
CaMn
 
6
Si
 
3
O
 
16
·7H
 
2
O
14.18.25Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
·9H
 
2
O
14.18.26Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
14.18.28Kvanefjeldite
Na
 
4
(Ca,Mn)(Si
 
3
O
 
7
)
 
2
(OH)
 
2
14.18.29Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
14.18.30Raite
(Na,Ca)
 
4
(Mn,Ti,Fe)
 
3
Si
 
8
O
 
16
(OH)
 
12
·5H
 
2
O
14.18.31Richterite
Na[CaNa][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.18.32Byelorussite-(Ce)
Ba
 
2
NaCe
 
2
MnTi
 
2
Si
 
8
O
 
26
(F,OH) · H
 
2
O
14.18.33Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
Si
 
6
O
 
20
(OH)
 
5
14.18.34Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
14.18.35Pyroxmangite
MnSiO
 
3
14.18.36Dannemorite
14.18.37Neotocite
(Mn,Fe,Mg)SiO
 
3
·H
 
2
O
14.18.38Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
14.18.39Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
14.18.40Örebroite
Mn
2+
3
(Fe
3+
 
,Sb
5+
 
)[(O,OH)
 
3
|SiO
 
4
]

Other Names for Sérandite

Other Languages:
German:Sérandit
Japanese:セラン石
Russian:Серандит
Spanish:Sérandita
Varieties:
Calcian Sérandite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Sérandite

Reference List:Mineralogical Record (1990): 21: 335-338.

Hammer, V.M.F., Libowitzky, E., and Rossman, G.R. (1998) Single-crystal IR spectroscopy of very strong hydrogen bonds in pectolite, NCa2[Si3O4(OH)], and serandite, NaMn2[Si3O4(OH)]. American Mineralogist: 83: 569-576.

American Mineralogist (2000): 85: 745-752.

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    Localities for Sérandite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Darling Co.
        • Tamworth
    		Min.Mag.: 60:369-374.
      • Forbes Co.
        • Grenfell
    		[MinRec 27:394]
    • Queensland
    		[var: Calcian Sérandite] Carr, Phillips & Williams - Min.Mag. 1976 40,853-6
    Brazil
     
    • South Region
      • Santa Catarina
    		1995, Geochimica Brasiliensis, 8: 179-214.
    Canada
     
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Tschernich, R. (1992): Zeolites of the World, p.52; Boissonault, J. and Perrault, G. (1965), Serandite from St. Hilaire, Quebec. Canadian Mineralogist: 8: 132.
      • Verchères Co.
        • Varennes & St-Amable
          • Saint-Amable sill
    		Mineralogical Record: 27: 306; Mineralogical Record: 29: 83.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
    		No reference listed
    Guinea
     
    • Los Archipelago (Los Islands)
    		Lacroix, A. (1931). Les pegmatites de la syénite sodalitique de l’île Rouma (archipel de Los, Guinée française). Description d’un noveau minéral (sérandite) qu’elles renferment. C. R. Acad. Sci. Paris, 192, 189-194.
    Italy
     
    • Liguria
      • La Spezia Province
        • Vara Valley
          • Borghetto Vara
    		Palenzona A., Di Giovanni F. (1990) - La serandite di Cerchiara (SP) - Rivista Mineralogica Italiaa, XIII, fasc. 1, pp. 42-43
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Vagli di Sotto
    		Biagioni C., 2004. Le mineralizzazioni manganesifere dei Diaspri Auctt. di Vagli (Alpi Apuane, Lucca). Tesina di Laurea inedita, Università di Pisa.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Akita Prefecture
          • Odate
    		Dr. Wilfried Steffens: "The Eudialyte Homepage" www.koeln.netsurf.de/~w.steffens/other.htm (where it is erroneously assumed to be related to alkaline igneous rocks)
        • Iwate Prefecture
    		Am Min 61:3-4 pp 229-237
    Namibia
     
    • Khomas Region
      • Windhoek District
        • Windhoek
          • Aris
    		Ellingsen, H. V. (2006): Sérandit aus Aris, Namibia. Mineralien-Welt 17 (3), 51. (in German)
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    		Mineralogical Record: 22: 421.
    Norway
     
    • Telemark
      • Porsgrunn
        • Bjørkedalen
    		Andersen, F.,Berge, S.A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. MineralienWelt 7(4):21-100
        • Mørje
    		Ljostad, O.T. (2005).
    • Vestfold
      • Larvik
        • Langesundsfjorden
    		Engvoldsen, T.;Berge,S.A.; Andersen, F. & Burvald, I. (1991): "Pegmatittmineraler fra Larvik ringkompleks", STEIN, nr 1,1991, 15-71 (in norwegian)
    Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
          • Lovozero Massif
            • Alluaiv Mt
              • Umbozero mine
    		Lapis, 4/97, Ivanjuk et al.
            • Karnasurt Mt
    		I. Pekov (1998) Minerals First Discovered on the Territory of the former Soviey Union
    Mineralogical Record (2000): 31: 203.
            • Kedykverpakhk Mt
    		I.V. Pekov et al.: Zap. Vses. Mineral. Obshch. 132(6):1-14 (2003)
            • Sengischorr Mt
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		[Von Bezing, K. L. et al. (1991) - The Kalahari manganese field : an update, Mineralogical Record, 22 (3), 279-302]
    • Northwest Province
      • Western Bushveld Complex
        • Rustenburg District
          • Pilansberg Complex
    		The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.
    USA
     
    • Arkansas
      • Pulaski Co.
        • Little Rock
    • California
      • San Benito Co.
        • New Idria District
    		Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452
    • New Mexico
      • Colfax Co.
        • Springer
          • Point of Rocks Mesa (Pecks Mesa)
    		Rocks & Min.:60:229.
    Mineral and/or Locality
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