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Denisovite

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.HA.85

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
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.HA.05Ertixiite
Na
 
2
Si
 
4
O
 
9
9.HA.10Kenyaite
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
·6H
 
2
O
9.HA.20Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
9.HA.25Magbasite
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
9.HA.30Afanasyevaite
Ca
 
8
[Si
 
2
O
 
7
]OCl
 
2
9.HA.40Igumnovite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
2
Cl
 
4
9.HA.50Rudenkoite
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
·H
 
2
O
9.HA.55Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
9.HA.60Nagelschmidtite
Ca
 
7
[PO
 
4
|SiO
 
4
]
 
2
9.HA.65Caryochroite
(Na,Sr)
 
3
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] ·(H
 
2
O, O, OH)
 
17
9.HA.70Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
·4H
 
2
O or near
9.HA.75Tacharanite
Ca
 
12
Al
 
2
Si
 
18
O
 
51
·18H
 
2
O
9.HA.80Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
·12.5H
 
2
O
9.HA.90Tiettaite
(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
KNa
 
2
Ca
 
2
[Si
 
8
O
 
19
(OH)]·6H
 
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
Other Languages:
German:Denisovit
Spanish: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

    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.
    (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
          • Chara and Tokko Rivers Confluence
    [Lapis 1993:4 p.13-20]
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    ZVMO,(1984) 113, 718-723
    ZVMO (1984) 113, 718-723; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Nov 2009 00:49:49