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Denisovite

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Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Thomas Witzke

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Formula:
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
System:MonoclinicHardness:4 - 5
This page provides mineralogical data about Denisovite.

Classification of Denisovite

IMA status:Approved
Strunz 8th edition ID:8/F.18-70
Nickel-Strunz 10th (pending) edition ID:9.DQ.20

9 : SILICATES (Germanates)
D : Inosilicates
Q : Unclassified inosilicates
Dana 8th edition ID:65.2.1.7

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
Hey's CIM Ref.:14.6.4

14 : Silicates not Containing Aluminum
6 : Silicates of Ca with alkali or Mg or both
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Type Occurrence of Denisovite

Co-type Localities:Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Yukspor Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1984

Physical Properties of Denisovite

Hardness (Mohs):4 - 5

Crystallography of Denisovite

Crystal System:Monoclinic
Cell Parameters:a = 30.92Å, b = 7.2Å, c = 18.27Å
β = 95°
Ratio:a:b:c = 4.294 : 1 : 2.538
Unit Cell Volume:V 4,051.86 ų (Calculated from Unit Cell)

Optical Data of Denisovite

Type:Biaxial (+)
RI values: nα = 1.567 nβ = 1.568 nγ = 1.576
Maximum Birefringence:δ = 0.009

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

Chemical Properties of Denisovite

Formula:
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
Essential elements:Ca, F, K, O, Si
All elements listed in formula:Ca, F, H, K, Na, O, Si
Common Impurities:Ti,Al,Fe,Nb,Mn,Mg,Sr,Ba,Li,Rb,P

Relationship of Denisovite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.DQ.05Fukalite
Ca
 
4
[CO
 
3
|(HSiO
 
4
)
 
2
]
9.DQ.10Tacharanite
Ca
 
12
Al
 
2
Si
 
18
O
 
51
·18H
 
2
O
9.DQ.15Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
·12.5H
 
2
O
9.DQ.25Tiettaite
(Na,K)
 
17
FeTiSi
 
16
O
 
29
(OH)
 
30
·2H
 
2
O
Related Minerals - Hey's Index Grouping:
14.6.1Combeite
Na
 
2
Ca
 
2
Si
 
3
O
 
9
14.6.2Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
14.6.3Pectolite-M2abc
NaCa
 
2
[HSi
 
3
O
 
9
]
14.6.5Tokkoite
K
 
2
Ca
 
4
Si
 
7
O
 
17
(O,OH,F)
 
4
14.6.6Mountainite
(Ca,Na
 
2
,K
 
2
)
 
2
[Si
 
4
O
 
10
] · 3H
 
2
O
14.6.7Rhodesite
KHCa
 
2
Si
 
8
O
 
19
·5H
 
2
O
14.6.8Miserite
K(Ca,Ce)
 
4
Si
 
5
O
 
13
(OH)
 
3
14.6.9Åkermanite
Ca
 
2
Mg[Si
 
2
O
 
7
]
14.6.10Monticellite
CaMg[SiO
 
4
]
14.6.11Merwinite
Ca
 
3
Mg[SiO
 
4
]
 
2
14.6.12Diopside
CaMg[Si
 
2
O
 
6
]
14.6.13Tremolite
☐[Ca
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]

Other Names for Denisovite

Synonyms:
IMA1982-031
German names:
Denisovit
Spanish names:
Denisovita

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 Denisovite

Reference List:American Mineralogist: 70: 1329.

Internet Links for Denisovite

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    Localities for Denisovite

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    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.
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Aldan Shield
          • Torgo River Basin
            • Davan
              • Chara River (Charo River)
    		[Lapis 1993:4 p.13-20]
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		ZVMO,(1984) 113, 718-723
    ZVMO (1984) 113, 718-723
    Mineral and/or Locality
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