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Alleghanyite

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Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
© Rob Lavinsky

Show Alleghanyite Photos (7)
Formula:
Mn
2+
5
[(OH)
 
2
|(SiO
 
4
)
 
2
]
System:MonoclinicColour:Greyish-pink
Hardness:5½


Humite Group .

Classification of Alleghanyite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/B.04-60
Nickel-Strunz 10th (pending) edition ID:9.AF.45

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Dana 8th edition ID:52.3.2b.1

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Hey's CIM Ref.:14.17.4

14 : Silicates not Containing Aluminum
17 : Silicates of Mn
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Type Occurrence of Alleghanyite

Type Locality:Bald Knob Deposit (Primary Ore Body; Crouse Knob Deposit), Bald Knob, Sparta, Alleghany Co., North Carolina, USA
Year of Discovery:1932

Physical Properties of Alleghanyite

Colour:Greyish-pink
Hardness (Mohs):5½

Crystallography of Alleghanyite

Crystal System:Monoclinic
Cell Parameters:a = 8.27Å, b = 4.85Å, c = 10.72Å
β = 104.64°
Ratio:a:b:c = 1.705 : 1 : 2.21
Unit Cell Volume:V 416.01 ų (Calculated from Unit Cell)

Optical Data of Alleghanyite

Type:Biaxial (-)
RI values: nα = 1.756 nβ = 1.780 nγ = 1.792
2V:Measured: 72° , Calculated: 68°
Maximum Birefringence:δ = 0.036

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

Chemical Properties of Alleghanyite

Formula:
Mn
2+
5
[(OH)
 
2
|(SiO
 
4
)
 
2
]
Essential elements:H, Mn, O, Si
All elements listed in formula:H, Mn, O, Si
Common Impurities:Ti,Al,Fe,Mg,Ca,F

Relationship of Alleghanyite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.AF.05Sillimanite
Al
 
2
[O|SiO
 
4
]
9.AF.10Andalusite
Al
 
2
[O|SiO
 
4
]
9.AF.10Kanonaite
Mn
3+
 
Al[O|SiO
 
4
]
9.AF.15Kyanite
Al
 
2
[O|SiO
 
4
]
9.AF.20Mullite
Al
 
8
[(O,OH,F)|(Si,Al)O
 
4
]
 
4
9.AF.20Krieselite
(Al,Ga)
 
2
[(OH)
 
2
|GeO
 
4
]
9.AF.25Yoderite
Mg(Al,Fe
3+
 
)
 
3
[O|OH|(SiO
 
4
)
 
2
]
9.AF.30Magnesiostaurolite
(Mg,Li,Fe
2+
 
)
 
1.5-2
Al
 
9
[O
 
6
|(OH)
 
2
|(SiO
 
4
)
 
4
]
9.AF.30Staurolite
(Fe
2+
 
,Mg,Zn)
 
1.5-2
Al
 
9
[O
 
6
|(OH,O)
 
2
|(SiO
 
4
)
 
4
]
9.AF.30Zincostaurolite
(Zn,Li,Fe
2+
 
,Mg)
 
<2
Al
 
9
[O
 
6
|(OH)
 
2
|(SiO
 
4
)
 
4
]
9.AF.35Topaz
Al
 
2
[(F,OH)
 
2
|SiO
 
4
]
9.AF.40Norbergite
Mg
 
3
[(F,OH)
 
2
|SiO
 
4
]
9.AF.45Chondrodite
(Mg,Fe
2+
 
)
 
5
[(F,OH)
 
2
|(SiO
 
4
)
 
2
]
9.AF.45Reinhardbraunsite
Ca
 
5
[(OH,F)
 
2
|(SiO
 
4
)
 
2
]
9.AF.50Humite
(Mg,Fe
2+
 
)
 
7
[(F,OH)
 
2
|(SiO
 
4
)
 
3
]
9.AF.50Manganhumite
(Mn
2+
 
,Mg)
 
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
9.AF.55Clinohumite
(Mg,Fe
2+
 
)
 
9
[(F,OH)
 
2
|(SiO
 
4
)
 
4
]
9.AF.55Sonolite
Mn
2+
9
[(OH,F)
 
2
|(SiO
 
4
)
 
4
]
9.AF.55Hydroxylclinohumite
Mg
 
9
[(OH,F)
 
2
|(SiO
 
4
)
 
4
]
9.AF.60Leucophoenicite
Mn
2+
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
9.AF.65Ribbeite
(Mn
2+
 
,Mg)
 
5
[(OH)
 
2
|(SiO
 
4
)
 
2
]
9.AF.70Jerrygibbsite
Mn
2+
9
[(OH)
 
2
|(SiO
 
4
)
 
4
]
9.AF.75Franciscanite
Mn
3+
6
V
5+
0.5
[(O,OH)
 
3
|SiO
 
4
]
9.AF.75Örebroite
Mn
2+
3
(Fe
3+
 
,Sb
5+
 
)[(O,OH)
 
3
|SiO
 
4
]
9.AF.75Welinite
Mn
3+
6
(W
6+
 
,Mg)
 
0.7
[(O,OH)
 
3
|SiO
 
4
]
9.AF.80Ellenbergerite
Mg
 
6
Al
 
6
Ti[(OH)
 
6
|(HSiO
 
4
)
 
4
|(SiO
 
4
)
 
4
]
9.AF.85Chloritoid
(Fe
2+
 
,Mg,Mn
2+
 
)Al
 
2
[O|(OH)
 
2
|SiO
 
4
]
9.AF.85Magnesiochloritoid
MgAl
 
2
[O|(OH)
 
2
|SiO
 
4
]
9.AF.85Ottrélite
(Mn
2+
 
,Fe
2+
 
,Mg)Al
 
2
[O|(OH)
 
2
|SiO
 
4
]
9.AF.90Poldervaartite
CaCa[SiO
 
3
OH](OH)
9.AF.90Olmiite
CaMn
2+
 
[SiO
 
3
(OH)](OH)
Related Minerals - Hey's Index Grouping:
14.17.1Rhodonite
MnSiO
 
3
14.17.2Tephroite
Mn
2+
2
[SiO
 
4
]
14.17.3Braunite
Mn
2+
 
Mn
3+
6
[O
 
8
|SiO
 
4
]
14.17.5Ribbeite
(Mn
2+
 
,Mg)
 
5
[(OH)
 
2
|(SiO
 
4
)
 
2
]
14.17.6Leucophoenicite
Mn
2+
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
14.17.7Jerrygibbsite
Mn
2+
9
[(OH)
 
2
|(SiO
 
4
)
 
4
]
14.17.8Bementite
Mn
 
5
Si
 
4
O
 
10
(OH)
 
6
14.17.9Parsettensite
Mn
 
5
Si
 
6
O
 
13
(OH)
 
8
14.17.10Yofortierite
Mn
 
5
Si
 
8
O
 
20
(OH)
 
2
·8-9H
 
2
O

Other Names for Alleghanyite

German names:
Alleghanyit
Russian names:
Аллеганит
Spanish names:
Alleghanyita

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 Alleghanyite

Reference List:American Mineralogist: 17: 1-15.

Zeitschrift für Kristallographie: 132: 1-18.

Internet Links for Alleghanyite

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  • Raman and XRD data at RRUFF project
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    Localities for Alleghanyite

    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.
    France
     
    • Midi-Pyrénées
      • Hautes-Pyrénées
    		 Le Règne Minéral 47: 5-21
          • Vielle Aure
    		DE ASCENCAO GUEDES R., TIXADOR Y., CASTERET A. & GOUJOU JC. (2002) La mine de Coustou, Vielle-Aure, Hautes-Pyrénées. Le Règne Minéral, 47, 23-31. (in french)
    Japan
     
    • Honshu Island
      • Chubu Region
        • Aichi Prefecture
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
        • Nagano Prefecture
          • Kami-Ina-gun
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
          • Nagawa-mura
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
      • Chugoku Region
        • Yamaguchi Prefecture
          • Iwakuni City
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Lee, D. E. (1955); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
          • Kudamatsu City
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
      • Kanto Region
        • Gunma Prefecture
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
        • Ibaraki Prefecture
          • Takanomine mine
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
        • Tochigi Prefecture
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
          • Kanuma
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
          • Tanuma
    		Collection of NHM, Vienna
        • Tokyo Prefecture
          • Nishi-Tama-gun
            • Okutama
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
      • Kinki Region
        • Kyoto Prefecture
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
          • Sohraku-gun
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
        • Shiga Prefecture
    		Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
      • Tohoku Region
        • Iwate Prefecture
          • Miyako City
    		Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
    Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
    • Shikoku Island
      • Kochi Prefecture
    		Kaneko, K. (1956) Symposium sobre yacimientos de manganeso. Vol. 4, 184 (Mexico, 1956)
    Kyrgyzstan
     
    • Issyk-Kul'skaya Oblast
      • Inyl'chek Range
        • Muzeinyi Valley
    		Pautov L.A., Khvorov P.V., Ignatenko K.I. Alleganyte from rhodonite rocks of Inylchek range (the first description of alleganyte from USSR), - Novye dannye o mineralah SSSR (New data on minerals of USSR), Moscow, Nauka, 1989, p. 162-166.
    Namibia
     
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    		Mineralogical Record: 22: 421.
    Sweden
     
    • Dalarna
      • Hedemora
        • Garpenberg
    		No reference listed
    • Värmland
      • Filipstad
    		Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183. ; K:Gatedal
        • Pajsberg
    		Kjell Gatedal
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Engadin
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 31
      • Plessur Valley
        • Langwies
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 31
    • St Gallen
      • Alvier Group
        • Sargans
    		Stalder, H. A., Wagner, A., Graeser, S. und Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf Verlag, Basel, 579 pp
    • Wallis (Valais)
      • Zermatt - Saas Fee area
        • Matter Valley
          • Täsch Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 30-31
    UK
     
    • Wales
      • Gwynedd (Caernarvonshire)
        • Lleyn Peninsula
          • Llanfaelrhys
            • Rhiw
    		No reference listed
    USA
     
    • California
      • Santa Clara Co.
        • San Jose
    		www.mineralsocal.org
    • Colorado
      • San Juan Co.
        • Silverton District
          • Howardsville
    		Rocks & Min.: 63: 366-384.
    • Connecticut
      • Middlesex Co.
        • Haddam
    		Rocks & Min.: 70:403
    • Massachusetts
      • Hampshire Co.
        • Cummington
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 58
        • Plainfield
    		\
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Cook, : Am. Min.:54:1392-1398 (1969); White,T.G. & Hyde, B.G.: Electron Microscope study of the humite minerals: II. Mn-rich specimens: Physics and Chemistry of Minerals:8:167-174 (1982); Dunn,P.J.:(1985); Dunn(1995):Pt3:349.
          • Ogdensburg
            • Sterling Hill
    		Cook, D.K.: Am. Min.:54:1392-1398 (1969); Petersen, et al: A highly magnesian alleghanyite from Sterling Hill, NJ: Min. Rec.:15:299-302 (1984); Francis, C. A.: Am. Min.:70:182-185 (1985); Dunn(1995):Pt3:348-349.
    • North Carolina
      • Alleghany Co.
        • Sparta
          • Bald Knob
    		Rocks & Min.: 60:130-135.
    • Virginia
      • Carroll Co.
        • Southern Section-Blue Ridge Province
          • Gossan Lead District
    		Minerals of Virginia 1990 by R. V. Dietrich
      • Pittsylvania Co.
        • James River-Roanoke River Mn-Fe-Ba District
    		AmMin 88:740-747 (2003)
    • Washington
      • Jefferson Co.
        • Mount Jupiter
          • Elkhorn Group
    		Minerals of Washington, Bart Cannon, 1975
      • Mason Co.
        • Copper Creek (Boulder Creek)
    		Cannon, B. (1975): Minerals of Washington, p.39
    Mineral and/or Locality
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