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Protomangano-ferro-anthophyllite

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Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka (Iisaka) Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan

Show Protomangano-ferro-anthophyllite Photos (2)
Formula:
☐[Mn
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
System:OrthorhombicColour:White to brownish-grey.
Lustre:VitreousHardness:5½ - 6
Name:For its structural relationship to the ortho-amphiboles, and the compositional relationship to protoferro-anthophyllite and anthophyllite


Amphibole Group. Mg-Fe-Mn-Li Ortho-Amphibole Subgroup.

Classification of Protomangano-ferro-anthophyllite

IMA status:Approved
Strunz 8th edition ID:8/F.12-160
Nickel-Strunz 10th (pending) edition ID:9.DD.05

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles
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Type Occurrence of Protomangano-ferro-anthophyllite

Type Locality:Nippyo mine (Yokoneyama), Tochigi Prefecture, Kanto Region, Honshu Island, Japan

Physical Properties of Protomangano-ferro-anthophyllite

Lustre:Vitreous
Colour:White to brownish-grey.
Streak:White to greyish-white
Hardness (Mohs):5½ - 6

Crystallography of Protomangano-ferro-anthophyllite

Crystal System:Orthorhombic

Optical Data of Protomangano-ferro-anthophyllite

Type:Biaxial (-)
RI values: nα = 1.695 nβ = 1.714 nγ = 1.731
Maximum Birefringence:δ = 0.036

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 Protomangano-ferro-anthophyllite

Formula:
☐[Mn
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
Essential elements:Fe, H, Mn, O, Si
All elements listed in formula:Fe, H, Mn, O, Si

Relationship of Protomangano-ferro-anthophyllite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.DD.05Anthophyllite
☐[Mg
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Ferro-anthophyllite
☐[Fe
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Ferrogedrite
☐[Fe
2+
2
][Fe
2+
3
Al
 
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Gedrite
☐[Mg
 
2
][Mg
 
3
Al
 
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Holmquistite
☐[Li
 
2
][Mg
 
3
Al
 
2
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Protoferro-anthophyllite
☐[Fe
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodicanthophyllite
[Na][NaMg][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodic-ferro-anthophyllite
[Na][NaFe
2+
 
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodic-ferrogedrite
[Na][Fe
2+
2
][Fe
2+
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Sodicgedrite
[Na][Mg
 
2
][Mg
 
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Ferroholmquistite
☐[Li
 
2
][Fe
2+
3
Al
 
2
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Protoanthophyllite
☐[Mg
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]

Other Names for Protomangano-ferro-anthophyllite

Synonyms:
IMA1986-007
Japanese names:
プロトマンガノ鉄直閃石
Russian names:
Протоманганоферроантофиллит

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 Protomangano-ferro-anthophyllite

Reference List:Physics and Chemistry of Minerals: 25: 366-377.

American Mineralogist (1999): 84: 196.

Sueno, S., Matsuura, S., Bunno, M., and Kurosawa, M. (2002) Occurrence and crystal chemical features of protoferro-anthophyllite and protomangano-ferroanthophyllite from Cheyenne Canyon and Cheyenne Mountain, U.S.A. and Hirukawa-mura, Suisho-yama, and Yokone-yama, Japan. Journal of Mineralogical and Petrological Sciences: 97: 127-136.

Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles: Canadian Mineralogist:
44(1): 1-21.

Internet Links for Protomangano-ferro-anthophyllite

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  • Raman and XRD data at RRUFF project
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    Localities for Protomangano-ferro-anthophyllite

    (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.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Tochigi Prefecture
    		AmMin 84:196; Journal of Mineralogical and Petrological Sciences: 97: 127-136.
      • Tohoku Region
        • Fukushima Prefecture
          • Kawamata
            • Iizaka (Iisaka) Village
    		Am.Min. 84: 196; Lapis 2002(11): 12; Journal of Mineralogical and Petrological Sciences: 97: 127-136.
    Mineral and/or Locality
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