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Pumpellyite-(Mg)

Formula:
Ca
 
2
MgAl
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
System:MonoclinicColour:Green, blue, blackish ...
Hardness:
Name:For US geologist, Raphael Pumpelly (1837-1923).


Pumpellyite Group. Julgoldite-(Fe2+)-Pumpellyite-(Mg) Series.

Classification of Pumpellyite-(Mg)

IMA status:Approved
Strunz 8th edition ID:8/C.24-30
Nickel-Strunz 10th (pending) edition ID:9.BG.20

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
Dana 8th edition ID:58.2.2.7

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Hey's CIM Ref.:16.11.7

16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
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Type Occurrence of Pumpellyite-(Mg)

Type Locality:Keweenaw Co., Michigan, USA

Physical Properties of Pumpellyite-(Mg)

Lustre:Vitreous
Colour:Green, blue, blackish green, brown
Streak:White
Hardness (Mohs):

Crystallography of Pumpellyite-(Mg)

Crystal System:Monoclinic

Optical Data of Pumpellyite-(Mg)

Type:Biaxial (+)
RI values: nα = 1.674 - 1.748 nβ = 1.675 - 1.754 nγ = 1.688 - 1.764
2V:Measured: 70° to 90°, Calculated: 32° to 76°
Maximum Birefringence:δ = 0.014 - 0.016

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

Chemical Properties of Pumpellyite-(Mg)

Formula:
Ca
 
2
MgAl
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
Essential elements:Al, Ca, H, Mg, O, Si
All elements listed in formula:Al, Ca, H, Mg, O, Si

Relationship of Pumpellyite-(Mg) to other Species

Series:Forms a series with Julgoldite-(Fe2+) (see here)
Forms a series with Pumpellyite-(Fe2+) (see here)
Related Minerals - Nickel-Strunz Grouping):
9.BG.05Allanite-(Ce)
{CaCe}{Al
 
2
Fe
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Allanite-(La)
{CaLa}{Al
 
2
Fe
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Allanite-(Y)
{CaY}{Al
 
2
Fe
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Clinozoisite
{Ca
 
2
}{Al
 
3
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Dissakisite-(Ce)
{CaCe}{Al
 
2
Mg}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Dollaseite-(Ce)
{CaCe}{MgAlMg}[F|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Epidote
{Ca
 
2
}{Al
 
2
Fe
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Epidote-(Pb)
{CaPb}{Al
 
3
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Khristovite-(Ce)
{CaCe}{MgAlMn
2+
 
}[F|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Mukhinite
{Ca
 
2
}{Al
 
2
V
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Piemontite
{Ca
 
2
}{Al
 
2
Mn
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Piemontite-(Sr)
{CaSr}{Al
 
2
Mn
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Manganiandrosite-(La)
{LaMn
2+
 
}{Mn
3+
 
AlMn
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Tawmawite
Ca
 
2
(Al,Fe
3+
 
,Cr)
 
3
[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Manganipiemontite-(Sr)
{CaSr}{Mn
3+
 
AlMn
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Ferriallanite-(Ce)
{CaCe}{Fe
3+
 
AlFe
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Clinozoisite-(Sr)
CaSrAl
 
3
(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Ferriepidote
9.BG.05Manganiandrosite-(Ce)
(Mn
2+
 
,Ca)(Ce,REE)AlMn
3+
 
Mn
2+
 
(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Dissakisite-(La)
{CaLa}{Al
 
2
Mg}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Vanadoandrosite-(Ce)
{Mn
2+
 
Ce}{V
3+
 
AlMn
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05Androsite-(La)
9.BG.05Uedaite-(Ce)
{Mn
2+
 
Ce}{Al
 
2
Fe
2+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.05IMA2006-055
CaSrAl
 
2
Fe
3+
 
(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.10Zoisite
{Ca
 
2
}{Al
 
3
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.15Macfallite
Ca
 
2
(Mn
3+
 
,Al)
 
3
[(OH)
 
3
|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.15Sursassite
Mn
 
2
Al
 
3
[(OH)
 
3
|SiO
 
4
|Si
 
2
O
 
7
]
9.BG.20Julgoldite-(Fe2+)
Ca
 
2
(Fe
2+
 
,Mg)(Fe
3+
 
,Al)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Okhotskite
Ca
 
8
(Mn,Mg)
 
4
(Mn,Al,Fe)
 
8
Si
 
12
O
 
56-n
(OH)
 
n
9.BG.20Pumpellyite-(Fe2+)
Ca
 
2
Fe
2+
 
Al
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Pumpellyite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
2
[(OH,O)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Pumpellyite-(Mn2+)
Ca
 
2
(Mn
2+
 
,Mg)(Al,Mn
3+
 
,Fe
3+
 
)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Shuiskite
Ca
 
2
(Mg,Al)(Cr,Al)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · 2H
 
2
O
9.BG.20Julgoldite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg)(Fe
3+
 
,Al)
 
2
[(OH,O)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Pumpellyite-(Al)
Ca
 
2
(Al,Fe
2+
 
,Mg)Al
 
2
[(OH,O)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Poppiite
Ca
 
2
(V
3+
 
,Fe
3+
 
,Mg)(V
3+
 
,Al)
 
2
[(OH,O)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.20Julgoldite-(Mg)
Ca
 
2
(Mg,Fe
2+
 
)(Fe
3+
 
,Al)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
9.BG.25Ganomalite
Pb
 
9
Ca
 
5
Mn[O|SiO
 
4
|(Si
 
2
O
 
7
)
 
4
]
9.BG.30Rustumite
Ca
 
10
(Si
 
2
O
 
7
)
 
2
(SiO
 
4
)Cl
 
2
(OH)
 
2
9.BG.35Vesuvianite
Ca
 
10
(Mg,Fe)
 
2
Al
 
4
Si
 
9
O
 
34
(OH)
 
4
9.BG.35Wiluite
Ca
 
19
(Al,Mg,Fe,Ti)
 
13
(B,Al,[ ])
 
5
Si
 
18
O
 
68
(O,OH)
 
10
9.BG.35Manganvesuvianite
Ca
 
19
Mn(Al,Mn,Fe)
 
19
(Mg,Mn)
 
2
Si
 
18
O
 
69
(OH)
 
9
9.BG.35Fluorvesuvianite
Ca
 
19
(Al,Mg,Fe
2+
 
)
 
13
[(F,OH,O)
 
10
|(SiO
 
4
)
 
10
|(Si
 
2
O
 
7
)
 
4
]
9.BG.40Vyuntspakhkite-(Y)
Y
 
4
Al
 
3
Si
 
5
O
 
18
(OH)
 
5
9.BG.45Dellaite
Ca
 
6
Si
 
3
O
 
11
(OH)
 
2
9.BG.50Gatelite-(Ce)
CaCe
 
3
Al
 
2
(Al,Mg)(Mg,Fe
2+
 
,Al)[(O,F)|(OH,O)
 
2
|(SiO
 
4
)
 
3
|Si
 
2
O
 
7
]
9.BG.55Västmanlandite-(Ce)
Ca(Ce,La)
 
3
Al
 
2
Mg
 
2
[F|(OH)
 
2
|(SiO
 
4
)
 
3
|Si
 
2
O
 
7
]
Related Minerals - Hey's Index Grouping:
16.11.1Madisonite
Ca
 
2
Mg
 
2
Al
 
2
Si
 
3
O
 
13
or near
16.11.3Alumino-magnesio-hornblende
Ca
 
2
Mg
 
4
Al
 
2
Si
 
7
O
 
22
(OH)
 
2
16.11.4Tschermakite
☐[Ca
 
2
][Mg
 
3
Fe
3+
 
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.11.5Clintonite
Ca(Mg,Al)
 
3
[(OH)
 
2
|Al
 
3
SiO
 
10
]
16.11.6Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
·4H
 
2
O or near
16.11.8Tacharanite
Ca
 
12
Al
 
2
Si
 
18
O
 
51
·18H
 
2
O
16.11.9Aluminobarroisite
☐[CaNa][Mg
 
3
Al
 
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.11.10Alumino-Magnesiotaramite
Na[CaNa][Mg
 
3
Al
 
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.11.12Edenite
Na[Ca
 
2
][Mg
 
5
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.11.13Pargasite
[Na][Ca
 
2
][Mg
 
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.11.14Magnesiokatophorite
Na[CaNa][Mg
 
4
(Al,Fe
3+
 
)][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.11.15Beidellite
(Na,Ca
 
0.5
)
 
0.3
Al
 
2
(Si,Al)
 
4
O
 
10
(OH)
 
2
·nH
 
2
O
16.11.15Magnesiosadanagaite
[Na][Ca
 
2
][Mg
 
3
Al
 
2
][(OH)
 
2
|Al
 
3
Si
 
5
O
 
22
]
16.11.16Sadanagaite
[Na][Ca
 
2
][Fe
2+
3
Al
 
2
][(OH)
 
2
|Al
 
3
Si
 
5
O
 
22
]

Other Names for Pumpellyite-(Mg)

Russian names:
Пумпеллиит-Mg
Varieties:
Chlorastrolite

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 Pumpellyite-(Mg)

Reference List:American Mineralogist (1925): 10: 412-418.

American Mineralogist (1976): 61: 176-177.

American Mineralogist (1983): 68: 1250.

American Mineralogist (1985): 70: 1011.

American Mineralogist (1992): 77: 1307-1308.

Internet Links for Pumpellyite-(Mg)

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  • Look for Pumpellyite-(Mg) on Wikipedia
  • Look for Pumpellyite-(Mg) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Pumpellyite-(Mg) in the Natural History Museum (London) online catalogue
  • Pumpellyite-(Mg) details from Handbook of Mineralogy (PDF)
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    Localities for Pumpellyite-(Mg)

    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.
    Canada
     
    • Québec
      • Richmond Co.
        • Shipton Township
          • Asbestos
    [MinRec 1979]
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Hradec Králové Region
        • Krkonoše Mts
    Šrein, V., Litochleb, J., Šreinová, B.: Vybrané skarnové a sblížené metamorfogenní mineralizace Českého masívu. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1998, roč. 6, s. 132-146.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Badenweiler
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Freiburg im Breisgau
          • Kirchzarten
            • Buchenbach
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Haslach
          • Urenkopf Mt.
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Kandern
          • Malsburg
            • Lütschenbach
    Lapis 21(12), 45 (1996)
        • Schapbach
          • Wildschapbach valley
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Tittling
            • Stützersdorf
    Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Rhineland-Palatinate
      • Niederkirchen
    Jan H.Bernard and Jaroslav Hyrsl,2004, Minerals and their Localities, pg #487
    Italy
     
    • Liguria
      • Genova Province
        • Ne
    [MinRec 32:360]
      • La Spezia Province
        • Levanto
    Bracco R., Castellaro F., Kolitsch U., 2005. Levyna-Ca e altre zeoliti da Costa Sopramare, Levanto (La Spezia, Liguria). Micro, (notizie mineralogiche), 2005 (2): 55-64.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Omegna
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    Norway
     
    • Telemark
      • Kragerø
    www.nags.net/Nags/mineraler/mineralside.htm
    Slovakia
     
    • Banská Bystrica Region
      • Western Slovenské Rudohorie Mts
    Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    UK
     
    • England
      • Cornwall
        • Mount's Bay District
          • Penzance - Ludgvan Area
            • Paul
    [Golley & Williams, 1995, 49 - "Cornish Mineral Reference Manual"]
        • Wendron & Falmouth District
          • Roseland Peninsula
    [Golley & Williams, 1995, 49 - "Cornish Mineral Reference Manual"]
    USA
     
    • California
      • Mendocino Co.
        • Laytonville
    • Maine
    King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1.
      • Washington Co.
        • Perry
    ef.: Dana 7:I:320; Rocks & Min.: 62:403-404. King & Foord, 1994: Mineralogy of Maine, V 1, p. 281
    • Michigan
      • Houghton Co.
        • Atlantic Mine
    No reference listed
        • Hancock
    Mineralogy of Michigan (2004) Heinrich & Robinson
        • Osceola
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Ripley
    [var: Chlorastrolite] USGS PP144
        • Twin Lakes
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Winona
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    Mineralogy of Michigan (2004) Heinrich & Robinson
        • Central
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    USGS PP144
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Delaware
    [var: Chlorastrolite] Bornhorst & Rose (1994) Self-guided geological field trip to the Keweenaw Peninsula, Michigan. Institute Lake Superior Geology proceedings vol 40 part 2
        • Lac La Belle
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Lake Superior
    [var: Chlorastrolite] USGS Bull 1309
    [var: Chlorastrolite] Gems and Minerals of America- Jay Ellis Ransom-1974
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
        • Mandan
    [var: Chlorastrolite] Mineralogy of Michigan (2004) Heinrich & Robinson
        • Phoenix
    (in part): Rocks & Min.:56:248.
    [var: Chlorastrolite]
    [var: Chlorastrolite] self collected at site, and verified through red metal minerals
    Personal observation- Jim Daly
      • Ontonagon Co.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Greenland
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Mass City
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Norwich
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Rockland
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Victoria
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Winona
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • New Jersey
      • Passaic Co.
        • Paterson
    No reference listed
    No reference listed
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Dunn, P.J.: Min.Rec.:10:160-165 (1979); Dunn(1995):Pt3:419.
    • Pennsylvania
      • Lebanon Co.
    Reed, Juliet C. (1976), Annotated Biblio. of Mins. New to the Pa List 1965-1974, The Mineralogical Soc. of PA, Inc.: 67-68; Zen, E-an (1970), "Pumpellyite from Bunker Hill, SE Pa,: US Geol. Sur Research, Prof. Paper 700A: A127; Lapham, D. M., and Barnes, J. H. (1971), "Unusual Mins Found in Pa," PA Geol, Vol. 2(6):2-3; Grant, R. W. (Jul, 1974), "PA Mins" (PM), PM(139), Keystone Newsletter.
    Mineral and/or Locality
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