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Sérandite

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Formula:
Na(Mn2+,Ca)2(HSi3O9)
System:
Triclinic
Colour:
Pale pink, salmon-red, ...
Hardness:
5 - 5½
Name:
Named in 1931 by Antoine François Alfred Lacroix after J.M. Sérand, lighthouse keeper of the Island of Rouma, Los, who assisted collecting the mineral and who coincidentally had a rosey pink complexion.
Pectolite-Sérandite Series. The manganese analogue of pectolite and the sodium analogue of tanohataite.

Visit gemdat.org for gemological information about Sérandite.

Classification of Sérandite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.DG.05

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
65.2.1.5

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
14.18.27

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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http://www.mindat.org/min-3622.html
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First Recorded Occurrence of Sérandite

General Appearance of First Recorded Material:
Pink bladed mineral
Place of Conservation of First Recorded Material:
Smithsonian, Washington DC 96515
Year of Discovery:
1931
Geological Setting of First Recorded Material:
Alkalic pegmatite

Occurrences of Sérandite

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

Physical Properties of Sérandite

Vitreous, Sub-Vitreous, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Comment:
Fibrous aggregates are 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, Splintery
Density:
3.34 g/cm3 (Measured)    3.42 g/cm3 (Calculated)

Crystallography of Sérandite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Space Group Setting:
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
Z:
2
Morphology:
Prismatic to acicular crystals
Twinning:
Around [010] compostion plane {100}, less commonly contact twin on {110}
X-Ray Powder Diffraction Data:
d-spacingIntensity
7.51 (25)
3.158 (90)
2.983 (100)
2.838 (65)
2.602 (35)
2.495 (45)
2.192 (60)
Comments:
ICDD 25-723

Optical Data of Sérandite

Type:
Biaxial (+)
RI values:
nα = 1.668 nβ = 1.671 nγ = 1.703
2V:
Measured: 39° , Calculated: 39°
Birefringence:
0.035
Max Birefringence:
δ = 0.035
Image 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(Mn2+,Ca)2(HSi3O9)
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Fe,Mg,K,H2O

Relationship of Sérandite to other Species

Series:
Forms a series with Pectolite (see here)
Other Members of Group:
BustamiteCaMn2+(Si2O6)
FerrobustamiteCaFe2+(Si2O6)
Keatingine
PectoliteNaCa2(HSi3O9)
TanohataiteLiMn2(HSi3O9)
WollastoniteCaSiO3
9.DG.05BustamiteCaMn2+(Si2O6)
9.DG.05FerrobustamiteCaFe2+(Si2O6)
9.DG.05PectoliteNaCa2(HSi3O9)
9.DG.05WollastoniteCaSiO3
9.DG.05Wollastonite-1ACaSiO3
9.DG.07CascanditeCa(Sc,Fe3+)(HSi3O9)
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2O
9.DG.10Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
9.DG.15FoshagiteCa4(Si3O9)(OH)2
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2O
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2O
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2O
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4
9.DG.35XonotliteCa6(Si6O17)(OH)2
9.DG.40HillebranditeCa2(SiO3)(OH)2
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O
9.DG.55EpididymiteNa2Be2Si6O15 · H2O
9.DG.60EudidymiteNa2Be2Si6O15 · H2O
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2O
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)
9.DG.70LitidioniteCuNaKSi4O10
9.DG.70ManaksiteKNaMnSi4O10
9.DG.75TinaksiteK2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
9.DG.75TokkoiteK2Ca4Si7O17(O,OH,F)4
9.DG.75SenkevichiteCsKNaCa2Ti[O|Si7O18(OH)]
9.DG.80CanasiteK2Na4Ca5(Si12O30(OH,F)4
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2O
9.DG.85MiseriteK(Ca,Ce)4Si5O13(OH)3
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2O
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
9.DG.95Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14
14.18.1Nambulite(Li,Na)Mn4Si5O14(OH)
14.18.2Natronambulite(Na,Li)(Mn,Ca)4Si5O14OH
14.18.3ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2O
14.18.4NorrishiteKLiMn23+(Si4O10)O2
14.18.5Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2O
14.18.6AbswurmbachiteCuMn63+(SiO4)O8
14.18.7Donpeacorite(Mn2+,Mg)Mg[SiO3]2
14.18.8KanoiteMn2+(Mg,Mn2+)Si2O6
14.18.9Caryopilite(Mn,Mg)3(Si2O5)(OH)4
14.18.10Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8
14.18.11Tirodite
14.18.12Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2
14.18.13BustamiteCaMn2+(Si2O6)
14.18.14GlaucochroiteCaMn2+SiO4
14.18.15Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2O
14.18.16SantaclaraiteCaMn4[Si5O14OH](OH) · H2O
14.18.17FerrobustamiteCaFe2+(Si2O6)
14.18.18JohannseniteCaMn2+Si2O6
14.18.19NeltneriteCaMn63+(SiO4)O8
14.18.20OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2O
14.18.21InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
14.18.22OrientiteCa2Mn2+Mn23+(Si3O10)(OH)4
14.18.23RuiziteCa2Mn23+[(OH)2|H2Si4O13] · 2H2O
14.18.24BostwickiteCaMn6Si3O16 · 7H2O
14.18.25KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2O
14.18.26LithiomarsturiteLiCa2Mn2Si5O14(OH)
14.18.28KvanefjelditeNa4(Ca,Mn)(Si3O7)2(OH)2
14.18.29MarsturiteNaCaMn3Si5O14(OH)
14.18.30RaiteNa4Mn32+Ti0.25Si8O20(OH)2 · 10H2O
14.18.31Richterite{Na}{CaNa}{Mg5}(Si8O22)(OH)2
14.18.32Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O
14.18.33Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
14.18.34Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
14.18.35PyroxmangiteMnSiO3
14.18.36Dannemorite
14.18.37Neotocite(Mn,Fe,Mg)SiO3 · H2O
14.18.38BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
14.18.39ManganbabingtoniteCa2(Mn,Fe)FeSi5O14(OH)
14.18.40ÖrebroiteMn32+(Sb5+,Fe3+)(SiO4)(O,OH)3

Other Names for Sérandite

Name in Other Languages:
German:Sérandit
Japanese:セラン石
Simplified Chinese:针钠锰石
桃针钠石
Spanish:Sérandita
Traditional Chinese:針鈉錳石
桃針鈉石

Other Information

Not fluorescent in UV
Health Risks:
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:
LACROIX, A. (1931) Les pegmatites de la syènite sodalitique de l'Îsle Rouma (Archipel de Los, Guinèe française). Desciption d'un nouveau minéral (sérandite) qu'elles renferment. Comptes Rendu, Academie des Sciences, Paris. 192, No.4. 187 194. (in French). English abstract: American Mineralogist, 16, (1931) 344.

SCHALLER, W.T. (1955) The pectolite schizolite serandite series. American Mineralogist, 40, 1022-1031.

BOISSONNAULT, J. and PERRAULT, G. (1965a) Serandite from St. Hilaire, Quebec. Canadian Mineralogist, 8, 132 (abstract).

HORVÁTH, L. and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284-359.

HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.

Manning, P. G. (1968): Absorption spectra of the manganese-bearing chain silicates pyroxmangite, rhodonite, bustamite and serandite. Canadian Mineralogist 9, 348-357.

Ohashi, Y. & Finger, L. W. (1978): The role of octahedral cations in pyroxenoid crystal chemistry. I. Bustamite, wollastonite, and the pectolite–schizolite–serandite series. American Mineralogist 63, 274-288.

Hammer, V.M.F., Libowitzky, E., and Rossman, G.R. (1998): Single-crystal IR spectroscopy of very strong hydrogen bonds in pectolite, NaCa2[Si3O4(OH)], and serandite, NaMn2[Si3O4(OH)]. American Mineralogist 83, 569-576.

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

Internet Links for Sérandite

Localities for Sérandite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
    • Somerset Region
[var: Calcian Sérandite] Carr, Phillips & Williams - Min.Mag. 1976 40,853-6
Brazil
 
  • Santa Catarina
1995, Geochimica Brasiliensis, 8: 179-214.; G Traversa et al (1994) Petrology and Mineral Chemistry of the Alkaline District of Lages, SC, Brazil. Geochem Brazil 8:179-214
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Boissonault, J. and Perrault, G. (1965), Serandite from St. Hilaire, Quebec. Canadian Mineralogist: 8: 132. HORVÁTH, L., & GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284 359.
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
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. ; Moreau, C., Ohnenstetter, D., Demaiffe, D., & Robineau, B. (1996). The Los Archipelago nepheline syenite ring-structure; a magmatic marker of the evolution of the Central and Equatorial Atlantic. The Canadian Mineralogist, 34(2), 281-299.
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
    • Kanto Region
      • Tokyo Metropolis
        • Nishi-Tama-gun
          • Okutama-cho
Matsubara S, Miyawaki R, Yokoyama K, Shimizu M, Imai H (2004) Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences 99, 363-367
    • 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
        • Shimohei-gun
Am Min 61:3-4 pp 229-237; Mineral.Journ.Japan (1985) 12, 332-340; Matsubara, S., Miyawaki, R., Kurosawa, M., & Suzuki, Y. (2002). Potassicleakeite, a New Amphibole from the Tanohata Mine, Iwate Prefecture, Japan. Journal of mineralogical and petrological sciences, 97(4), 177-184.
Matsubara, S., Miyawaki, R., Yokoyama, K., Shigeoka, M., Miyajima, H., Suzuki, Y., ... & Ishibashi, T. (2010). Momoiite and nagashimalite from the Tanohata mine, Iwate Prefecture, Japan. Bulletin of the National Museum of Nature and Science C, 36, 1-6.
Namibia
 
  • Khomas Region
    • Windhoek District
      • Aris
Ellingsen, H. V. (2006): Sérandit aus Aris, Namibia. Mineralien-Welt 17 (3), 51. (in German); Prof. Friedrich Koller, University of Vienna (chemical analyses on thin sections; pers. comm. to U. Kolitsch, 7/2009)
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
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
        • Sagåsen
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp
  • Vestfold
    • Larvik
      • Langesundsfjorden
        • Vesle Arøya
Engvoldsen, T., Andersen, F., Berge, S. A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18 (1), 15-71; Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp
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
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Lovozero Massif
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Umbozero mine (Umbozerskii mine; Umba Mine)
Lapis, 4/97, Ivanjuk et al.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
V. Grishin collection
Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 130, issue 2, 53-58
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I. et al (2003): New Data on Minerals: 38: 20-33. ; Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
I. Pekov (1998) Minerals First Discovered on the Territory of the former Soviey Union
Mineralogical Record (2000): 31: 203.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Kedykverpakhk Mt
I.V. Pekov et al.: Zap. Vses. Mineral. Obshch. 132(6):1-14 (2003)
          • Sengischorr Mt
            • Motchisuai River Valley
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
South Africa
 
  • North West Province
    • Bojanala Platinum District
      • Western Bushveld Complex
The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.; MITCHELL, R.H. & LIFEROVICH, R.P. (2004) Ecandrewsite - zincian pyrophanite from lujavrite. Pilansber alkaline complex, South Africa. Canadian Mineralogist), 42, 1169-1178.
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
    • Postmasburg manganese field
      • Kathu
        • Sishen
John M. Moore, Barbara K. Kuhn, Darren F. Mark, and Harilaos Tsikos (2011): A sugilite-bearing assemblage from the Wolhaarkop breccia, Bruce iron-ore mine, South Africa: Evidence for alkali metasomatism and 40Ar-39Ar dating. Eur. J. Mineral. 23, 661-673.
USA
 
  • Arkansas
    • Pulaski Co.
      • Little Rock
Rocks and Minerals, (1988) 63:104-125; Rocks and Minerals, (1989) 64:314-322
Henry Barwood - unpublished (2010)
  • California
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • San Benito River headwaters area
            • Dallas Gem Mine area
Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 410.
  • New Mexico
    • Colfax Co.
      • Springer
        • Point of Rocks Mesa (Pecks Mesa)
Rocks & Min.:60:229.
Mineral and/or Locality  
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