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Schorlomite

Big Photo

Tanfit, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco
© Christian Bracke

Show Schorlomite Photos (20)
Formula:
Ca
 
3
(Ti,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
,Fe
2+
 
)O
 
4
]
 
3
System:IsometricColour:Black, brown-black
Lustre:Sub-MetallicHardness:7 - 7½
Name:For its visual resemblance to schorl


Garnet Group.

Much of the material labelled "schorlomite" is, strictly speaking, titanian andradite.

Classification of Schorlomite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/A.08-120
Nickel-Strunz 10th (pending) edition ID:9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
Dana 8th edition ID:51.4.3c.1

51 : NESOSILICATES Insular SiO4 Groups Only
4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Hey's CIM Ref.:14.9.35

14 : Silicates not Containing Aluminum
9 : Silicates of Ti
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Type Occurrence of Schorlomite

Type Locality:Magnet Cove, Hot Spring Co., Arkansas, USA
Year of Discovery:1846

Physical Properties of Schorlomite

Lustre:Sub-Metallic
Colour:Black, brown-black
Streak:Dark brown
Hardness (Mohs):7 - 7½

Crystallography of Schorlomite

Crystal System:Isometric
Cell Parameters:a = 12.15Å
Unit Cell Volume:V 1,793.61 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Schorlomite

Type:Isotropic

Chemical Properties of Schorlomite

Formula:
Ca
 
3
(Ti,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
,Fe
2+
 
)O
 
4
]
 
3
Essential elements:Ca, Fe, O, Si
All elements listed in formula:Ca, Fe, O, Si, Ti
Common Impurities:Na,Al,Mn,Mg,Na,K,H20,P,Zr,V

Relationship of Schorlomite to other Species

Series:Forms a series with Andradite (see here)
Member of:Garnet Group
Related Minerals - Nickel-Strunz Grouping):

- +
9.AD.05Larnite
Ca
 
2
[SiO
 
4
]
9.AD.10Calcio-Olivine
Ca
 
2
[SiO
 
4
]
9.AD.15Merwinite
Ca
 
3
Mg[SiO
 
4
]
 
2
9.AD.20Bredigite
Ca
 
7
Mg[SiO
 
4
]
 
4
9.AD.25Andradite
Ca
 
3
Fe
3+
2
[SiO
 
4
]
 
3
9.AD.25Almandine
Fe
2+
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
9.AD.25Goldmanite
Ca
 
3
(V
3+
 
,Al,Fe
3+
 
)
 
2
[SiO
 
4
]
 
3
9.AD.25Grossular
Ca
 
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Henritermierite
Ca
 
3
(Mn
3+
 
,Al)
 
2
[(OH)
 
4
|(SiO
 
4
)
 
2
]
9.AD.25Hibschite
Ca
 
3
Al
 
2
[(OH)
 
6-1
|(SiO
 
4
)
 
1.5-2.5
]
9.AD.25Hydroandradite
Ca
 
3
Fe
3+
2
(SiO
 
4
)
 
3-x
(OH)
 
4x
9.AD.25Katoite
Ca
 
3
Al
 
2
[(OH)
 
8-6
|(SiO
 
4
)
 
1-1.5
]
9.AD.25Kimzeyite
Ca
 
3
(Zr,Ti)
 
2
[(Si,Al,Fe
3+
 
)O
 
4
]
 
3
9.AD.25Knorringite
Mg
 
3
Cr
 
2
[SiO
 
4
]
 
3
9.AD.25Majorite
Mg
 
3
(Fe
2+
 
,Si,Al)
 
2
[SiO
 
4
]
 
3
9.AD.25Morimotoite
Ca
 
3
(Ti,Fe
2+
 
,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
)O
 
4
]
 
3
 (?)
9.AD.25Pyrope
Mg
 
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Spessartine
Mn
2+
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Uvarovite
Ca
 
3
Cr
 
2
[SiO
 
4
]
 
3
9.AD.25Wadalite
Ca
 
6
(Al,Mg)
 
4
[Cl
 
3
|O
 
4
|{(Si,Al,Fe
3+
 
)O
 
4
}
 
3
]
9.AD.25Holtstamite
Ca
 
3
(Al,Mn
3+
 
)
 
2
(SiO
 
4
)
 
2
(OH)
 
4
9.AD.25IMA2009-029
Ca
 
3
Zr
 
2
(Fe
3+
2
Si)O
 
12
9.AD.25IMA2009-033
Ca
 
3
Sn
 
2
(Fe
 
2
Si)O
 
12
9.AD.25IMA2009-026
(Mn
2+
 
,Ca)
 
3
V
3+
2
(SiO
 
4
)
 
3
9.AD.30Coffinite
(U,Th)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
9.AD.30Hafnon
(Hf,Zr)[SiO
 
4
]
9.AD.30Thorite
(Th,U)[SiO
 
4
]
9.AD.30Thorogummite
(Th,U)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
9.AD.30Zircon
Zr[SiO
 
4
]
9.AD.30Stetindite-(Ce)
Ce[SiO
 
4
]
9.AD.35Huttonite
Th[SiO
 
4
]
9.AD.35Tombarthite-(Y)
Y
 
4
[HSiO
 
4
]
 
3
9.AD.40Eulytine
Bi
 
4
[SiO
 
4
]
 
3
9.AD.45Reidite
Zr[SiO
 
4
]
Related Minerals - Hey's Index Grouping:

- +
14.9.1Natisite
Na
 
2
Ti[O|SiO
 
4
]
14.9.2Lorenzenite
Na
 
2
Ti
 
2
[O
 
3
|Si
 
2
O
 
6
]
14.9.3Lintisite
LiNa
 
3
Ti
 
2
[O|Si
 
2
O
 
6
]
 
2
 · 2H
 
2
O
14.9.4Davanite
K
 
2
TiSi
 
6
O
 
15
14.9.5Kazakovite
Na
 
6
Ti[Si
 
6
O
 
16
(OH)
 
2
]
14.9.6Titanite
CaTi[O|SiO
 
4
]
14.9.7Ohmilite
Sr
 
3
(Ti,Fe
3+
 
)[(O,OH)|(Si
 
2
O
 
6
)
 
2
] · 2-3H
 
2
O
14.9.8Lamprophyllite
(Sr,K,Ba)
 
2
(Na,Ti,Mn
2+
 
,Fe
3+
 
)
 
4
Ti
 
2
[O|(O,OH,F)|Si
 
2
O
 
7
]
 
2
14.9.9Benitoite
BaTi[Si
 
3
O
 
9
]
14.9.10Batisite
Na
 
2
BaTi
 
2
[O|Si
 
2
O
 
6
]
 
2
14.9.11Fresnoite
Ba
 
2
Ti[O|Si
 
2
O
 
7
]
14.9.12Joaquinite-(Ce)
Ba
 
2
NaCe
 
2
FeTi
 
2
Si
 
8
O
 
26
(OH,F) · H
 
2
O
14.9.13Orthojoaquinite-(Ce)
Ba
 
2
NaCe
 
2
FeTi
 
2
Si
 
8
O
 
26
(O,OH) · H
 
2
O
14.9.14Strontiojoaquinite
Sr
 
2
Ba
 
2
(Na,Fe)
 
2
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
2
·H
 
2
O
14.9.15Bario-orthojoaquinite
(Ba,Sr)
 
4
Fe
 
2
Ti
 
2
Si
 
8
O
 
26
·H
 
2
O
14.9.16Strontio-orthojoaquinite
Sr
 
2
Ba
 
2
(Na,Fe)
 
2
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
2
·H
 
2
O
14.9.17Bafertisite
Ba(Fe
3+
 
,Mn
2+
 
)
 
2
Ti[O|(O,OH)
 
2
|Si
 
2
O
 
7
]
14.9.18Hejtmanite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Ti[O|(OH,F)
 
2
|Si
 
2
O
 
7
]
14.9.19Delindeite
(Na,K)
 
2.7
(Ba,Ca)
 
4
(Ti,Fe,Al)
 
6
Si
 
8
O
 
26
(OH)
 
14
14.9.20Barytolamprophyllite
(Ba,Na)
 
2
(Na,Ti,Fe
3+
 
)
 
4
Ti
 
2
[O|(OH,F)|Si
 
2
O
 
7
]
 
2
14.9.21Trimounsite-(Y)
Y
 
2
Ti
 
2
[O
 
5
|SiO
 
4
]
14.9.22Perrierite-(Ce)
Ce
 
4
MgFe
3+
2
Ti
4+
2
O
 
8
(Si
 
2
O
 
7
)
 
2
14.9.23Chevkinite
(Ca,Ce,Th)
 
4
(Fe,Mn)
 
2
(Ti,Fe)
 
3
Si
 
4
O
 
22
14.9.24Strontiochevkinite
(Sr,La,Ce,Ca)
 
4
Fe
3+
 
(Ti,Zr)
 
2
Ti
 
2
[O
 
4
|Si
 
2
O
 
7
]
 
2
14.9.25Tisinalite
Na
 
3
H
 
3
(Mn,Ca,Fe)TiSi
 
6
(O,OH)
 
18
·2H
 
2
O
14.9.26Neptunite
Na
 
2
KLi(Fe
2+
 
,Mn
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
14.9.27Manganoneptunite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
14.9.28Kupletskite
(K,Na)
 
3
(Mn,Fe)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
14.9.29Astrophyllite
(K,Na)
 
3
(Fe,Mn)
 
7
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
7
14.9.30Hydroastrophyllite
(H
 
3
O,K,Ca)
 
3
(Fe,Mn)
 
5-65
Ti
 
2
Si
 
8
(O,OH)
 
31
14.9.31Magnesioastrophyllite
(Na,K)
 
4
Mg
 
2
(Fe,Fe,Mn)
 
5
Ti
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
14.9.32Baratovite
KCa
 
7
(Ti,Zr)
 
2
Li
 
3
Si
 
12
O
 
36
F
 
2
14.9.34Aenigmatite
Na
 
2
Fe
2+
5
TiO
 
2
(Si
 
6
O
 
18
)
14.9.36Tinaksite
K
 
2
Na(Ca,Mn
2+
 
)
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
14.9.37Janhaugite
(Na,Ca)
 
3
(Mn,Fe)
 
3
(Ti,Zr,Nb)
 
2
Si
 
4
O
 
15
(OH,F,O)
 
3
14.9.38Koashvite
Na
 
6
(Ca,Mn)(Ti,Fe)Si
 
6
O
 
18
·H
 
2
O

Other Names for Schorlomite

Synonyms:
FerrotitaniteIiwaariteIvaarite
Other Languages:
German:Ferrotitanit
Iiwaarit
Ivaarit
Schorlomit
Russian:Шорломит
Spanish:Ferrotitanita
Iiwaarita
Ivaarita
Schorlomita

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 Schorlomite

Reference List:Howie, R.A., A.R. Wooley, J.H. Scoon, R.C. Tyler & J.N. Walsh (1968), The role of titanium and the effect of TiO2 on the cell size, refractive index, and specific gravity in the andradite-melanite-schorlomite series: Mineralogical Magazine: 36: 775-790.

Manning, P.G. & D.C. Harris (1970), Optical absorption and electron-microprobe studies of some high-Ti andradites: Canadian Mineralogist: 10: 260-271.

Huggins, F.E., D. Virgo & H.G. Huckenbolz (1977), Titanium-containing silicate garnets: II. The crystal chemistry of melanites and schorlomites: American Mineralogist: 62: 646-665.

Schwartz, K.B., Nolet, D.A., and Burns, R.G. (1980) Mössbauer spectroscopy and crystal chemistry of natural Fe-Ti garnets. American Mineralogist: 65: 142-153.

American Mineralogist (1989): 74: 422.

Canadian Mineralogist 33 (1995): 627-631.

Armbruster, Th., Birrer, J., Libowitzky, E., Beran, A. (1998): Crystal chemistry of Ti-bearing andradites, European Journal of Mineralogy, Vol. 10, 907-921

Chakhmouradian, A. R.; McCammon, C. A. (2005): Schorlomite: a discussion of the crystal chemistry, formula, and inter-species boundaries. Physics and Chemistry of Minerals 32, 277-289.

Internet Links for Schorlomite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    Localities for Schorlomite

    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.
    (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.
    Brazil
     
    • Southeast Region
      • São Paulo
        • Cajati
    		MinRec 15:261-270
    Cameroon
     
    • South-West Region
      • Buea
        • Cameroon Mt.
    		Bindi, L., Bonazzi, P., Fitton, G.J. (2001): Crystal chemistry of strontian soda melilite from nephelinite lava of Mt. Etinde, Cameroon, European Journal of Mineralogy; February 2001; Vol. 13; p. 121-125
    Canada
     
    • British Columbia
      • Golden Mining Division
    		No reference listed
    • Québec
      • Saguenay-Lac-Saint-Jean
        • Le Fjord-du-Saguenay RCM
          • Saint-Honoré
    		Currie (1976) GSC Bulletin 239, 109-110
    China
     
    • Hebei Province
      • Baoding Prefecture
        • Laiyuan Co.
    		Chang Zhaoshan and Feng Zhongyan (1996): Acta Scientiarum Naturalium Universitatis Pekinensis 32(6), 724-733.
      • Zhangjiakou Prefecture
        • Zhuolu Co.
    		Baolei Mu, Junjun Cai, and Zhenhui Bian (1998): Acta Petrologica et Mineralogica 17(4), 359-370.
    Finland
     
    • Oulun (Oulu) Lääni
      • Kuusamo
    Germany
     
    • Baden-Württemberg
    		Armbruster, Th., Birrer, J., Libowitzky, E., Beran, A. (1998): Crystal chemistry of Ti-bearing andradites, European Journal of Mineralogy, Vol. 10, 907-921
    • Lower Saxony
      • Harz Mts
        • Bad Harzburg
    		No reference listed
    • Rhineland-Palatinate
      • Eifel Mts
        • Gerolstein
          • Rockeskyll
    		Riley, T., Bailey, K., lloyd, F.,, Extrusive carbonatite from the quaternary Rockeskyll complex, West Eifel, Germany, Can. Min., Vol 34, 389-401, 1996
        • Hillesheim
    		Hentschel, G., Die Lavaströme der Graulai: eine neue Fundstelle in der Westeifel, Lapis, Weise Verlag München, 09/1993
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.)
    		Blass, G., Graf, H.W., Kolitsch, U., Neue Funde und Mineralien aus der Vulkaneifel, Mineralien-Welt 13/1, 52-57, 2002
        • Rieden volcano
          • Mayen
            • Ettringen
    		Viereck, L., Geologische und petrologische Entwicklung des pleistozänen Vulkankomplexes Rieden, Ost-Eifel, Bochumer geol. Geotechn. Arbeiten 17, 1984
          • Niederzissen
            • Wehr
    		Viereck, L., Geologische und petrologische Entwicklung des pleistozänen Vulkankomplexes Rieden, Ost-Eifel, Bochumer geol. Geotechn. Arbeiten 17, 1984
    Greenland
     
    • Kitaa (West Greenland) Province
      • Paamiut (Frederikshåb)
    		http://www.koeln.netsurf.de/~w.steffens/green.htm
    • Tunu (East Greenland) Province
      • Kangerlussuaq Firth
        • Kangerlussuaq complex
    		MinRec 16:485-494
    Iraq
     
    • Qala-Diz (Qala-Dizeh; Qala-Diza)
      • Hero
    Israel
     
    • Negev desert
    		Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
    Italy
     
    • Latium
      • Rieti Province
        • Rieti
          • Cupaello Basso Locality
    		Stoppa, F., and Woolley, A.R. (1997): Mineralogy and Petrology 59, 43-67.
    • Umbria
      • Terni Province
    		F. Stoppa and Y. Liu, Eur. J. Mineral. , 1995, 7, pp. 391-402.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    		(= titanium-rich andradite)
    Mongolia
     
    • Gobi Desert
    		Pavel M. Kartashov data
    Morocco
     
    • Meknès-Tafilalet Region
      • Er Rachidia Province
        • High Atlas Mts
    		various added photos
      • Khénifra Province
        • High Atlas Mts
          • Tamazeght complex
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
    		C Bracke collection
    Norway
     
    • Telemark
      • Skien
        • Brennseter
    		A. O. Larsen, 1993, "Gruver og skjerp i Skien", p. 11.
    Jamtveit B., Dahlgren S. and Austrheim H., (1997): "High-grade contact metamorphism of calcareous rocks from the Oslo Rift, Southern Norway".
    Russia
     
    • Eastern-Siberian Region
      • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
        • Maimecha and Kotui Rivers Basin
    		Pavel M. Kartashov data
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
    		P.M. Kartashov data
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Afrikanda
    		[World of Stones 95:5-6, 64]; Chakhmouradian, A. R.; McCammon, C. A. (2005): Schorlomite: a discussion of the crystal chemistry, formula, and inter-species boundaries. Physics and Chemistry of Minerals 32, 277-289.
    www.koeln.netsurf.de/~w.steffens/khib.htm
            • Kukisvumchorr Mt
    		Shlyukova Z.V. (1986) Mineralogy of contact formations of Khibina massif, - Moscow, Nauka, p. 96 (in Rus.)
          • Turii Cape
    		www.koeln.netsurf.de/~w.steffens/tury.htm
    www.koeln.netsurf.de/~w.steffens/vuori.htm
    USA
     
    • Arkansas
      • Hot Spring Co.
    		Shepard CU: Amer.J.Sci. 2nd ser.(1846) 2, 249-254; Chakhmouradian, A. R.; McCammon, C. A. (2005): Schorlomite: a discussion of the crystal chemistry, formula, and inter-species boundaries. Physics and Chemistry of Minerals 32, 277-289.
    • California
      • Humboldt Co.
        • Orick District
          • Orick
    		American Mineralogist: (1983) 68: 245-254.
      • San Benito Co.
        • Diablo Range
          • New Idria District
    • Colorado
      • Gunnison Co.
        • White Earth District (Powderhorn District)
    		"Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997
    Mineral and/or Locality
    Google
     
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