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Tingelstadtjern Quarry, Modum, Buskerud, Norway

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Magnesite/serpentine deposit.

Years after the magnesite mining ended, serpentinite (partly intergrown with reddish magnesite) was taken from the dumps and used as decorative stones, in tables, etc.



References:
- Jøsang, Ottar (1966): Geologiske og petrologiske undersøkelser i Modumfeltet. Norges Geologiske Undersøkelse nr 235, 91-97.

- Raade, G. (1975): Althausite, a new mineral from Modum, Norway. LITHOS 8, 215-219.

- Raade, G. & Mladeck, M. H. (1979): Holtedahlite, a new magnesium phospate from Modum, Norway. LITHOS 12, 283-287.

- Rømming, C. & Raade, G. (1980): The crystal structure of Althausite. American Mineralogist, 65, 488-498.

- Raade, G., Mladeck, M. H. & Din, V.K. (1986): Heneuite, CaMg5(CO3)(PO4)3(OH), a new mineral from Modum, Norway. N. Jb. Miner. Mh. H. 8, 343-350.

- Rømming, C. & Raade, G. (1989): The crystal structure of natural and synthetic Holtedahlite. Mineralogy and Petrology 40: 91-100.

- Raade, G. (1999): Et unikt mineralselskap av magnesiumfosfater fra magnesitt-serpentin-forekomster på Modum. Bergverksmuseets Skrift nr 15, 10-14 [in norwegian].

- Kristiansen, R. (2001): Raadeitt- enda et nytt magnesiumfosfat fra Modum. STEIN 28 (4), 6-7.

- Larsen, K.E. (2007): Mineralportrettet: Althausitt Mg2(PO4)(OH,F,O). STEIN 34 (4), 28.




Group 4 - Oxides and Hydroxides
  		• Hematite4.CB.05
    Fe
     
    2
    		O
     
    3
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Group 5 - Nitrates and Carbonates
  		• Dolomite5.AB.10
    CaMg(CO
     
    3
    		)
     
    2
  		• Hydromagnesite5.DA.05
    Mg
     
    5
    		[(CO
     
    3
    		)
     
    4
    		(OH)
     
    2
    		] · 4H
     
    2
    		O
  		• Magnesite5.AB.05
    MgCO
     
    3
    Group 6 - Borates
  		• Szaibélyite6.BA.15
    Mg
     
    2
    		[(OH)(B
     
    2
    		O
     
    4
    		(OH))]
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Althausite (TL)8.BB.25
    Mg
     
    2
    		[(OH,F)|PO
     
    4
    		]
  		• Apatite-(CaCl)8.BN.05
    Ca
     
    5
    		[Cl|(PO
     
    4
    		)
     
    3
    		]
  		• Apatite-(CaOH)8.BN.05
    Ca
     
    5
    		[OH|(PO
     
    4
    		)
     
    3
    		]
  		• Heneuite (TL)8.BO.25
    CaMg
     
    5
    		(CO
     
    3
    		)(PO
     
    4
    		)
     
    3
    		OH
  		• Holtedahlite (TL)8.BB.20
    Mg
     
    2
    		[OH|PO
     
    4
    		]
  		• Phosphoellenbergerite8.BB.55
    Mg
     
    14
    		[(OH)
     
    6
    		|(HPO
     
    4
    		,CO
     
    3
    		)
     
    2
    		|(PO
     
    4
    		)
     
    6
    		]
  		• Raadeite (TL)8.BE.30
    Mg
     
    7
    		(PO
     
    4
    		)
     
    2
    		(OH)
     
    8
  		• Xenotime-(Y)8.AD.35
    YPO
     
    4
    Group 9 - Silicates
  		• Chrysotile9.ED.15
    Mg
     
    3
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
  		• Clinochlore
    var: Leuchtenbergite    		9.EC.55
    (Mg,Fe
    2+
     
    		)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Lizardite9.ED.15
    Mg
     
    3
    		[(OH)
     
    4
    		|Si
     
    2
    		O
     
    5
    		]
  		• Talc9.EC.05
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    Unclassified Minerals
  		• 'Apatite'-
  		• 'Serpentine Group'-
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O


    20 entries listed. 18 valid minerals.

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