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Hummerite

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Hummer Mine, Jo Dandy Mine (Paradox D; Hummer; C; Blackburn; Yellow Bird No. 1; Oversight; Broker), Paradox Valley, Uravan District, Montrose Co., Colorado, USA
© Brent Thorne

Show Hummerite Photos (8)
Formula:
K
 
2
Mg
 
2
[V
 
10
O
 
28
] · 16H
 
2
O
System:Triclinic
This page provides mineralogical data about Hummerite.

Classification of Hummerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/G.01-20
Nickel-Strunz 10th (pending) edition ID:4.HC.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
Dana 8th edition ID:47.2.2.1

47 : VANADIUM OXYSALTS
2 : Anhydrous Vanadium Oxysalts Containing Hydroxyl or Halogen
Hey's CIM Ref.:21.2.12

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
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Type Occurrence of Hummerite

Type Locality:Hummer Mine, Jo Dandy Mine (Paradox D; Hummer; C; Blackburn; Yellow Bird No. 1; Oversight; Broker), Paradox Valley, Uravan District, Montrose Co., Colorado, USA
Year of Discovery:1950

Crystallography of Hummerite

Crystal System:Triclinic
Cell Parameters:a = 10.81Å, b = 11.01Å, c = 8.85Å
α = 106.07°, β = 107.82°, γ = 65.67°
Ratio:a:b:c = 0.982 : 1 : 0.804
Unit Cell Volume:V 899.82 ų (Calculated from Unit Cell)

Optical Data of Hummerite

Type:Biaxial (-)
Dispersion:r > v

Chemical Properties of Hummerite

Formula:
K
 
2
Mg
 
2
[V
 
10
O
 
28
] · 16H
 
2
O
Essential elements:H, K, Mg, O, V
All elements listed in formula:H, K, Mg, O, V

Relationship of Hummerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.HC.05Pascoite
Ca
 
3
[V
 
10
O
 
28
] · 17H
 
2
O
4.HC.05Lasalite
Na
 
2
Mg
 
2
[V
 
10
O
 
28
] · 20H
 
2
O
4.HC.15Sherwoodite
Ca
 
9
Al
 
2
V
 
4
V
 
24
O
 
80
·56H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
21.2.1Metarossite
Ca[V
 
2
O
 
6
] · 2H
 
2
O
21.2.2Rossite
Ca[V
 
2
O
 
6
] · 4H
 
2
O
21.2.3Metahewettite
Ca[V
 
2
O
 
6
|V
 
4
O
 
10
] · 3H
 
2
O
21.2.4Hewettite
Ca[V
 
2
O
 
6
|V
 
4
O
 
10
] · 9H
 
2
O
21.2.5Pintadoite
Ca
 
2
V
 
2
O
 
7
·9H
 
2
O
21.2.6Hendersonite
(Ca,Sr)
 
x
(V
5+
 
,V
4+
 
)
 
12
O
 
32
·12H
 
2
O (x about 2.6)
21.2.7Fernandinite
(Ca,K)[(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
4
O
 
10
]
 
2
 · 4H
 
2
O
21.2.8Pascoite
Ca
 
3
[V
 
10
O
 
28
] · 17H
 
2
O
21.2.9Sherwoodite
Ca
 
9
Al
 
2
V
 
4
V
 
24
O
 
80
·56H
 
2
O
21.2.10Melanovanadite
Ca
 
2
V
 
4
V
 
6
O
 
25
·nH
 
2
O
21.2.11Grantsite
(Na
 
2
,Ca)[V
 
2
O
 
6
|(V
5+
 
,V
4+
 
)
 
4
O
 
10
] · 4H
 
2
O
21.2.13Metadelrioite
CaSr[(OH)
 
2
|V
 
2
O
 
6
]
21.2.14Delrioite
CaSr[(OH)
 
2
|V
 
2
O
 
6
] · 3H
 
2
O
21.2.15Straczekite
(Ca,K,Ba)V
 
8
O
 
20
·3H
 
2
O
21.2.16Gamagarite
Ba
 
2
(Fe
3+
 
,Mn
3+
 
)[OH|(VO
 
4
)
 
2
]

Other Names for Hummerite

Other Languages:
German:Hummerit
Russian:Хаммерит
Spanish:Hummerita

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 Hummerite

Reference List:American Mineralogist: 36: 326-327.

Internet Links for Hummerite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hummerite in the Natural History Museum (London) online catalogue
  • Hummerite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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  • rare and unusual minerals mainly crystallized
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    Localities for Hummerite

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